Vincent Selhorst-Jones combines a scientific background, acting training, and years of teaching experience to help you fully comprehend concepts rather than just “plug 'n' chug” equations. Vincent is passionate about sharing his love of physics and will help you understand how a problem comes together, what it means, and why you should care. Topics cover everything in High School Physics from Motion, Force, and Energy, to Waves, Thermodynamics, and Electricity. Vincent has been teaching over 8+ years and double-majored in Mathematics and Theater at Pomona College, as well as received an M.F.A. in Acting from Harvard University.
| I. Motion |
| |
Math Review |
16:49 |
| | |
Intro |
0:00 | |
| | |
The Metric System |
0:26 | |
| | |
| Distance, Mass, Volume, and Time |
0:27 | |
| | |
Scientific Notation |
1:40 | |
| | |
| Examples: 47,000,000,000 and 0.00000002 |
1:41 | |
| | |
Significant Figures |
3:18 | |
| | |
| Significant Figures Overview |
3:19 | |
| | |
| Properties of Significant Figures |
4:04 | |
| | |
| How Significant Figures Interact |
7:00 | |
| | |
Trigonometry Review |
8:57 | |
| | |
| Pythagorean Theorem, sine, cosine, and tangent |
8:58 | |
| | |
Inverse Trigonometric Functions |
9:48 | |
| | |
| Inverse Trigonometric Functions |
9:49 | |
| | |
Vectors |
10:44 | |
| | |
| Vectors |
10:45 | |
| | |
Scalars |
12:10 | |
| | |
| Scalars |
12:11 | |
| | |
Breaking a Vector into Components |
13:17 | |
| | |
| Breaking a Vector into Components |
13:18 | |
| | |
Length of a Vector |
13:58 | |
| | |
| Length of a Vector |
13:59 | |
| | |
| Relationship Between Length, Angle, and Coordinates |
14:45 | |
| |
One Dimensional Kinematics |
26:02 |
| | |
Intro |
0:00 | |
| | |
Position |
0:06 | |
| | |
| Definition and Example of Position |
0:07 | |
| | |
Distance |
1:11 | |
| | |
| Definition and Example of Distance |
1:12 | |
| | |
Displacement |
1:34 | |
| | |
| Definition and Example of Displacement |
1:35 | |
| | |
Comparison |
2:45 | |
| | |
| Distance vs. Displacement |
2:46 | |
| | |
Notation |
2:54 | |
| | |
| Notation for Location, Distance, and Displacement |
2:55 | |
| | |
Speed |
3:32 | |
| | |
| Definition and Formula for Speed |
3:33 | |
| | |
| Example: Speed |
3:51 | |
| | |
Velocity |
4:23 | |
| | |
| Definition and Formula for Velocity |
4:24 | |
| | |
∆ - Greek: 'Delta' |
5:01 | |
| | |
| ∆ or 'Change In' |
5:02 | |
| | |
Acceleration |
6:02 | |
| | |
| Definition and Formula for Acceleration |
6:03 | |
| | |
| Example: Acceleration |
6:38 | |
| | |
Gravity |
7:31 | |
| | |
| Gravity |
7:32 | |
| | |
Formulas |
8:44 | |
| | |
| Kinematics Formula 1 |
8:45 | |
| | |
| Kinematics Formula 2 |
9:32 | |
| | |
| Definitional Formulas |
14:00 | |
| | |
Example 1: Speed of a Rock Being Thrown |
14:12 | |
| | |
Example 2: How Long Does It Take for the Rock to Hit the Ground? |
15:37 | |
| | |
Example 3: Acceleration of a Biker |
21:09 | |
| | |
Example 4: Velocity and Displacement of a UFO |
22:43 | |
| |
Multi-Dimensional Kinematics |
29:59 |
| | |
Intro |
0:00 | |
| | |
What's Different About Multiple Dimensions? |
0:07 | |
| | |
| Scalars and Vectors |
0:08 | |
| | |
A Note on Vectors |
2:12 | |
| | |
| Indicating Vectors |
2:13 | |
| | |
Position |
3:03 | |
| | |
| Position |
3:04 | |
| | |
Distance and Displacement |
3:35 | |
| | |
| Distance and Displacement: Definitions |
3:36 | |
| | |
| Distance and Displacement: Example |
4:39 | |
| | |
Speed and Velocity |
8:57 | |
| | |
| Speed and Velocity: Definition & Formulas |
8:58 | |
| | |
| Speed and Velocity: Example |
10:06 | |
| | |
Speed from Velocity |
12:01 | |
| | |
| Speed from Velocity |
12:02 | |
| | |
Acceleration |
14:09 | |
| | |
| Acceleration |
14:10 | |
| | |
Gravity |
14:26 | |
| | |
| Gravity |
14:27 | |
| | |
Formulas |
15:11 | |
| | |
| Formulas with Vectors |
15:12 | |
| | |
Example 1: Average Acceleration |
16:57 | |
| | |
Example 2A: Initial Velocity |
19:14 | |
| | |
Example 2B: How Long Does It Take for the Ball to Hit the Ground? |
21:35 | |
| | |
Example 2C: Displacement |
26:46 | |
| |
Frames of Reference |
18:36 |
| | |
Intro |
0:00 | |
| | |
Fundamental Example |
0:25 | |
| | |
| Fundamental Example Part 1 |
0:26 | |
| | |
| Fundamental Example Part 2 |
1:20 | |
| | |
General Case |
2:36 | |
| | |
| Particle P and Two Observers A and B |
2:37 | |
| | |
| Speed of P from A's Frame of Reference |
3:05 | |
| | |
What About Acceleration? |
3:22 | |
| | |
| Acceleration Shows the Change in Velocity |
3:23 | |
| | |
| Acceleration when Velocity is Constant |
3:48 | |
| | |
Multi-Dimensional Case |
4:35 | |
| | |
| Multi-Dimensional Case |
4:36 | |
| | |
Some Notes |
5:04 | |
| | |
| Choosing the Frame of Reference |
5:05 | |
| | |
Example 1: What Velocity does the Ball have from the Frame of Reference of a Stationary Observer? |
7:27 | |
| | |
Example 2: Velocity, Speed, and Displacement |
9:26 | |
| | |
Example 3: Speed and Acceleration in the Reference Frame |
12:44 | |
| |
Uniform Circular Motion |
16:34 |
| | |
Intro |
0:00 | |
| | |
Centripetal Acceleration |
1:21 | |
| | |
| Centripetal Acceleration of a Rock Being Twirled Around on a String |
1:22 | |
| | |
| Looking Closer: Instantaneous Velocity and Tangential Velocity |
2:35 | |
| | |
| Magnitude of Acceleration |
3:55 | |
| | |
| Centripetal Acceleration Formula |
5:14 | |
| | |
You Say You Want a Revolution |
6:11 | |
| | |
| What is a Revolution? |
6:12 | |
| | |
| How Long Does it Take to Complete One Revolution Around the Circle? |
6:51 | |
| | |
Example 1: Centripetal Acceleration of a Rock |
7:40 | |
| | |
Example 2: Magnitude of a Car's Acceleration While Turning |
9:20 | |
| | |
Example 3: Speed of a Point on the Edge of a US Quarter |
13:10 | |
| II. Force |
| |
Newton's 1st Law |
12:37 |
| | |
Intro |
0:00 | |
| | |
Newton's First Law/ Law of Inertia |
2:45 | |
| | |
| A Body's Velocity Remains Constant Unless Acted Upon by a Force |
2:46 | |
| | |
Mass & Inertia |
4:07 | |
| | |
| Mass & Inertia |
4:08 | |
| | |
Mass & Volume |
5:49 | |
| | |
| Mass & Volume |
5:50 | |
| | |
Mass & Weight |
7:08 | |
| | |
| Mass & Weight |
7:09 | |
| | |
Example 1: The Speed of a Rocket |
8:47 | |
| | |
Example 2: Which of the Following Has More Inertia? |
10:06 | |
| | |
Example 3: Change in Inertia |
11:51 | |
| |
Newton's 2nd Law: Introduction |
27:05 |
| | |
Intro |
0:00 | |
| | |
Net Force |
1:42 | |
| | |
| Consider a Block That is Pushed On Equally From Both Sides |
1:43 | |
| | |
| What if One of the Forces was Greater Than the Other? |
2:29 | |
| | |
| The Net Force is All the Forces Put Together |
2:43 | |
| | |
Newton's Second Law |
3:14 | |
| | |
| Net Force = (Mass) x (Acceleration) |
3:15 | |
| | |
Units |
3:48 | |
| | |
| The Units of Newton's Second Law |
3:49 | |
| | |
Free-Body Diagram |
5:34 | |
| | |
| Free-Body Diagram |
5:35 | |
| | |
Special Forces: Gravity (Weight) |
8:05 | |
| | |
| Force of Gravity |
8:06 | |
| | |
Special Forces: Normal Force |
9:22 | |
| | |
| Normal Force |
9:23 | |
| | |
Special Forces: Tension |
10:34 | |
| | |
| Tension |
10:35 | |
| | |
Example 1: Force and Acceleration |
12:19 | |
| | |
Example 2: A 5kg Block is Pushed by Five Forces |
13:24 | |
| | |
Example 3: A 10kg Block Resting On a Table is Tethered Over a Pulley to a Free-Hanging 2kg Block |
16:30 | |
| |
Newton's 2nd Law: Multiple Dimensions |
27:47 |
| | |
Intro |
0:00 | |
| | |
Newton's 2nd Law in Multiple Dimensions |
0:12 | |
| | |
| Newton's 2nd Law in Multiple Dimensions |
0:13 | |
| | |
Components |
0:52 | |
| | |
| Components |
0:53 | |
| | |
| Example: Force in Component Form |
1:02 | |
| | |
Special Forces |
2:39 | |
| | |
| Review of Special Forces: Gravity, Normal Force, and Tension |
2:40 | |
| | |
Normal Forces |
3:35 | |
| | |
| Why Do We Call It the Normal Forces? |
3:36 | |
| | |
| Normal Forces on a Flat Horizontal and Vertical Surface |
5:00 | |
| | |
| Normal Forces on an Incline |
6:05 | |
| | |
Example 1: A 5kg Block is Pushed By a Force of 3N to the North and a Force of 4N to the East |
10:22 | |
| | |
Example 2: A 20kg Block is On an Incline of 50° With a Rope Holding It In Place |
16:08 | |
| | |
Example 3: A 10kg Block is On an Incline of 20° Attached By Rope to a Free-hanging Block of 5kg |
20:50 | |
| |
Newton's 2nd Law: Advanced Examples |
42:05 |
| | |
Intro |
0:00 | |
| | |
Block and Tackle Pulley System |
0:30 | |
| | |
| A Single Pulley Lifting System |
0:31 | |
| | |
| A Double Pulley Lifting System |
1:32 | |
| | |
| A Quadruple Pulley Lifting System |
2:59 | |
| | |
Example 1: A Free-hanging, Massless String is Holding Up Three Objects of Unknown Mass |
4:40 | |
| | |
Example 2: An Object is Acted Upon by Three Forces |
10:23 | |
| | |
Example 3: A Chandelier is Suspended by a Cable From the Roof of an Elevator |
17:13 | |
| | |
Example 4: A 20kg Baboon Climbs a Massless Rope That is Attached to a 22kg Crate |
23:46 | |
| | |
Example 5: Two Blocks are Roped Together on Inclines of Different Angles |
33:17 | |
| |
Newton's Third Law |
16:47 |
| | |
Intro |
0:00 | |
| | |
Newton's Third Law |
0:50 | |
| | |
| Newton's Third Law |
0:51 | |
| | |
Everyday Examples |
1:24 | |
| | |
| Hammer Hitting a Nail |
1:25 | |
| | |
| Swimming |
2:08 | |
| | |
| Car Driving |
2:35 | |
| | |
| Walking |
3:15 | |
| | |
Note |
3:57 | |
| | |
| Newton's Third Law Sometimes Doesn't Come Into Play When Solving Problems: Reason 1 |
3:58 | |
| | |
| Newton's Third Law Sometimes Doesn't Come Into Play When Solving Problems: Reason 2 |
5:36 | |
| | |
Example 1: What Force Does the Moon Pull on Earth? |
7:04 | |
| | |
Example 2: An Astronaut in Deep Space Throwing a Wrench |
8:38 | |
| | |
Example 3: A Woman Sitting in a Bosun's Chair that is Hanging from a Rope that Runs Over a Frictionless Pulley |
12:51 | |
| |
Friction |
50:11 |
| | |
Intro |
0:00 | |
| | |
Introduction |
0:04 | |
| | |
| Our Intuition - Materials |
0:30 | |
| | |
| Our Intuition - Weight |
2:48 | |
| | |
| Our Intuition - Normal Force |
3:45 | |
| | |
The Normal Force and Friction |
4:11 | |
| | |
| Two Scenarios: Same Object, Same Surface, Different Orientations |
4:12 | |
| | |
| Friction is Not About Weight |
6:36 | |
| | |
Friction as an Equation |
7:23 | |
| | |
| Summing Up Friction |
7:24 | |
| | |
| Friction as an Equation |
7:36 | |
| | |
The Direction of Friction |
10:33 | |
| | |
| The Direction of Friction |
10:34 | |
| | |
A Quick Example |
11:16 | |
| | |
| Which Block Will Accelerate Faster? |
11:17 | |
| | |
Static vs. Kinetic |
14:52 | |
| | |
| Static vs. Kinetic |
14:53 | |
| | |
| Static and Kinetic Coefficient of Friction |
16:31 | |
| | |
How to Use Static Friction |
17:40 | |
| | |
| How to Use Static Friction |
17:41 | |
| | |
Some Examples of μs and μk |
19:51 | |
| | |
| Some Examples of μs and μk |
19:52 | |
| | |
A Remark on Wheels |
22:19 | |
| | |
| A Remark on Wheels |
22:20 | |
| | |
Example 1: Calculating μs and μk |
28:02 | |
| | |
Example 2: At What Angle Does the Block Begin to Slide? |
31:35 | |
| | |
Example 3: A Block is Against a Wall, Sliding Down |
36:30 | |
| | |
Example 4: Two Blocks Sitting Atop Each Other |
40:16 | |
| |
Force & Uniform Circular Motion |
26:45 |
| | |
Intro |
0:00 | |
| | |
Centripetal Force |
0:46 | |
| | |
| Equations for Centripetal Force |
0:47 | |
| | |
| Centripetal Force in Action |
1:26 | |
| | |
Where Does Centripetal Force Come From? |
2:39 | |
| | |
| Where Does Centripetal Force Come From? |
2:40 | |
| | |
Centrifugal Force |
4:05 | |
| | |
| Centrifugal Force Part 1 |
4:06 | |
| | |
| Centrifugal Force Part 2 |
6:16 | |
| | |
Example 1: Part A - Centripetal Force On the Car |
8:12 | |
| | |
Example 1: Part B - Maximum Speed the Car Can Take the Turn At Without Slipping |
8:56 | |
| | |
Example 2: A Bucket Full of Water is Spun Around in a Vertical Circle |
15:13 | |
| | |
Example 3: A Rock is Spun Around in a Vertical Circle |
21:36 | |
| III. Energy |
| |
Work |
28:34 |
| | |
Intro |
0:00 | |
| | |
Equivocation |
0:05 | |
| | |
| Equivocation |
0:06 | |
| | |
Introduction to Work |
0:32 | |
| | |
| Scenarios: 10kg Block on a Frictionless Table |
0:33 | |
| | |
| Scenario: 2 Block of Different Masses |
2:52 | |
| | |
Work |
4:12 | |
| | |
| Work and Force |
4:13 | |
| | |
| Paralleled vs. Perpendicular |
4:46 | |
| | |
| Work: A Formal Definition |
7:33 | |
| | |
An Alternate Formula |
9:00 | |
| | |
| An Alternate Formula |
9:01 | |
| | |
Units |
10:40 | |
| | |
| Unit for Work: Joule (J) |
10:41 | |
| | |
Example 1: Calculating Work of Force |
11:32 | |
| | |
Example 2: Work and the Force of Gravity |
12:48 | |
| | |
Example 3: A Moving Box & Force Pushing in the Opposite Direction |
15:11 | |
| | |
Example 4: Work and Forces with Directions |
18:06 | |
| | |
Example 5: Work and the Force of Gravity |
23:16 | |
| |
Energy: Kinetic |
39:07 |
| | |
Intro |
0:00 | |
| | |
Types of Energy |
0:04 | |
| | |
| Types of Energy |
0:05 | |
| | |
Conservation of Energy |
1:12 | |
| | |
| Conservation of Energy |
1:13 | |
| | |
What is Energy? |
4:23 | |
| | |
| Energy |
4:24 | |
| | |
What is Work? |
5:01 | |
| | |
| Work |
5:02 | |
| | |
Circular Definition, Much? |
5:46 | |
| | |
| Circular Definition, Much? |
5:47 | |
| | |
Derivation of Kinetic Energy (Simplified) |
7:44 | |
| | |
| Simplified Picture of Work |
7:45 | |
| | |
| Consider the Following Three Formulas |
8:42 | |
| | |
Kinetic Energy Formula |
11:01 | |
| | |
| Kinetic Energy Formula |
11:02 | |
| | |
Units |
11:54 | |
| | |
| Units for Kinetic Energy |
11:55 | |
| | |
Conservation of Energy |
13:24 | |
| | |
| Energy Cannot be Made or Destroyed, Only Transferred |
13:25 | |
| | |
Friction |
15:02 | |
| | |
| How Does Friction Work? |
15:03 | |
| | |
Example 1: Velocity of a Block |
15:59 | |
| | |
Example 2: Energy Released During a Collision |
18:28 | |
| | |
Example 3: Speed of a Block |
22:22 | |
| | |
Example 4: Speed and Position of a Block |
26:22 | |
| |
Energy: Gravitational Potential |
28:10 |
| | |
Intro |
0:00 | |
| | |
Why Is It Called Potential Energy? |
0:21 | |
| | |
| Why Is It Called Potential Energy? |
0:22 | |
| | |
Introduction to Gravitational Potential Energy |
1:20 | |
| | |
| Consider an Object Dropped from Ever-Increasing heights |
1:21 | |
| | |
Gravitational Potential Energy |
2:02 | |
| | |
| Gravitational Potential Energy: Derivation |
2:03 | |
| | |
| Gravitational Potential Energy: Formulas |
2:52 | |
| | |
| Gravitational Potential Energy: Notes |
3:48 | |
| | |
Conservation of Energy |
5:50 | |
| | |
| Conservation of Energy and Formula |
5:51 | |
| | |
Example 1: Speed of a Falling Rock |
6:31 | |
| | |
Example 2: Energy Lost to Air Drag |
10:58 | |
| | |
Example 3: Distance of a Sliding Block |
15:51 | |
| | |
Example 4: Swinging Acrobat |
21:32 | |
| |
Energy: Elastic Potential |
44:16 |
| | |
Intro |
0:00 | |
| | |
Introduction to Elastic Potential |
0:12 | |
| | |
| Elastic Object |
0:13 | |
| | |
| Spring Example |
1:11 | |
| | |
Hooke's Law |
3:27 | |
| | |
| Hooke's Law |
3:28 | |
| | |
| Example of Hooke's Law |
5:14 | |
| | |
Elastic Potential Energy Formula |
8:27 | |
| | |
| Elastic Potential Energy Formula |
8:28 | |
| | |
Conservation of Energy |
10:17 | |
| | |
| Conservation of Energy |
10:18 | |
| | |
You Ain't Seen Nothin' Yet |
12:12 | |
| | |
| You Ain't Seen Nothin' Yet |
12:13 | |
| | |
Example 1: Spring-Launcher |
13:10 | |
| | |
Example 2: Compressed Spring |
18:34 | |
| | |
Example 3: A Block Dangling From a Massless Spring |
24:33 | |
| | |
Example 4: Finding the Spring Constant |
36:13 | |
| |
Power & Simple Machines |
29:19 |
| | |
Intro |
0:00 | |
| | |
Introduction to Power & Simple Machines |
0:06 | |
| | |
| What's the Difference Between a Go-Kart, a Family Van, and a Racecar? |
0:07 | |
| | |
| Consider the Idea of Climbing a Flight of Stairs |
1:13 | |
| | |
Power |
2:35 | |
| | |
| P= W / t |
2:36 | |
| | |
Alternate Formulas |
2:59 | |
| | |
| Alternate Formulas |
3:00 | |
| | |
Units |
4:24 | |
| | |
| Units for Power: Watt, Horsepower, and Kilowatt-hour |
4:25 | |
| | |
Block and Tackle, Redux |
5:54 | |
| | |
| Block and Tackle Systems |
5:55 | |
| | |
Machines in General |
10:09 | |
| | |
| Levers |
10:10 | |
| | |
| Ramps |
11:16 | |
| | |
Example 1: Power of Force |
12:47 | |
| | |
Example 2: Power &Lifting a Watermelon |
14:46 | |
| | |
Example 3: Work and Instantaneous Power |
16:30 | |
| | |
Example 4: Power and Acceleration of a Race car |
26:21 | |
| IV. Momentum |
| |
Center of Mass |
36:55 |
| | |
Intro |
0:00 | |
| | |
Introduction to Center of Mass |
0:04 | |
| | |
| Consider a Ball Tossed in the Air |
0:05 | |
| | |
Center of Mass |
1:27 | |
| | |
| Definition of Center of Mass |
1:28 | |
| | |
| Example of center of Mass |
2:13 | |
| | |
| Center of Mass: Derivation |
4:21 | |
| | |
| Center of Mass: Formula |
6:44 | |
| | |
| Center of Mass: Formula, Multiple Dimensions |
8:15 | |
| | |
| Center of Mass: Symmetry |
9:07 | |
| | |
| Center of Mass: Non-Homogeneous |
11:00 | |
| | |
Center of Gravity |
12:09 | |
| | |
| Center of Mass vs. Center of Gravity |
12:10 | |
| | |
Newton's Second Law and the Center of Mass |
14:35 | |
| | |
| Newton's Second Law and the Center of Mass |
14:36 | |
| | |
Example 1: Finding The Center of Mass |
16:29 | |
| | |
Example 2: Finding The Center of Mass |
18:55 | |
| | |
Example 3: Finding The Center of Mass |
21:46 | |
| | |
Example 4: A Boy and His Mail |
28:31 | |
| |
Linear Momentum |
22:50 |
| | |
Intro |
0:00 | |
| | |
Introduction to Linear Momentum |
0:04 | |
| | |
| Linear Momentum Overview |
0:05 | |
| | |
| Consider the Scenarios |
0:45 | |
| | |
Linear Momentum |
1:45 | |
| | |
| Definition of Linear Momentum |
1:46 | |
| | |
Impulse |
3:10 | |
| | |
| Impulse |
3:11 | |
| | |
Relationship Between Impulse & Momentum |
4:27 | |
| | |
| Relationship Between Impulse & Momentum |
4:28 | |
| | |
Why is It Linear Momentum? |
6:55 | |
| | |
| Why is It Linear Momentum? |
6:56 | |
| | |
Example 1: Momentum of a Skateboard |
8:25 | |
| | |
Example 2: Impulse and Final Velocity |
8:57 | |
| | |
Example 3: Change in Linear Momentum and magnitude of the Impulse |
13:53 | |
| | |
Example 4: A Ball of Putty |
17:07 | |
| |
Collisions & Linear Momentum |
40:55 |
| | |
Intro |
0:00 | |
| | |
Investigating Collisions |
0:45 | |
| | |
| Momentum |
0:46 | |
| | |
| Center of Mass |
1:26 | |
| | |
Derivation |
1:56 | |
| | |
| Extending Idea of Momentum to a System |
1:57 | |
| | |
| Impulse |
5:10 | |
| | |
Conservation of Linear Momentum |
6:14 | |
| | |
| Conservation of Linear Momentum |
6:15 | |
| | |
Conservation and External Forces |
7:56 | |
| | |
| Conservation and External Forces |
7:57 | |
| | |
Momentum Vs. Energy |
9:52 | |
| | |
| Momentum Vs. Energy |
9:53 | |
| | |
Types of Collisions |
12:33 | |
| | |
| Elastic |
12:34 | |
| | |
| Inelastic |
12:54 | |
| | |
| Completely Inelastic |
13:24 | |
| | |
| Everyday Collisions and Atomic Collisions |
13:42 | |
| | |
Example 1: Impact of Two Cars |
14:07 | |
| | |
Example 2: Billiard Balls |
16:59 | |
| | |
Example 3: Elastic Collision |
23:52 | |
| | |
Example 4: Bullet's Velocity |
33:35 | |
| V. Gravity |
| |
Gravity & Orbits |
34:53 |
| | |
Intro |
0:00 | |
| | |
Law of Universal Gravitation |
1:39 | |
| | |
| Law of Universal Gravitation |
1:40 | |
| | |
| Force of Gravity Equation |
2:14 | |
| | |
Gravitational Field |
5:38 | |
| | |
| Gravitational Field Overview |
5:39 | |
| | |
| Gravitational Field Equation |
6:32 | |
| | |
Orbits |
9:25 | |
| | |
| Orbits |
9:26 | |
| | |
The 'Falling' Moon |
12:58 | |
| | |
| The 'Falling' Moon |
12:59 | |
| | |
Example 1: Force of Gravity |
17:05 | |
| | |
Example 2: Gravitational Field on the Surface of Earth |
20:35 | |
| | |
Example 3: Orbits |
23:15 | |
| | |
Example 4: Neutron Star |
28:38 | |
| VI. Waves |
| |
Intro to Waves |
35:35 |
| | |
Intro |
0:00 | |
| | |
Pulse |
1:00 | |
| | |
| Introduction to Pulse |
1:01 | |
| | |
Wave |
1:59 | |
| | |
| Wave Overview |
2:00 | |
| | |
Wave Types |
3:16 | |
| | |
| Mechanical Waves |
3:17 | |
| | |
| Electromagnetic Waves |
4:01 | |
| | |
| Matter or Quantum Mechanical Waves |
4:43 | |
| | |
| Transverse Waves |
5:12 | |
| | |
| Longitudinal Waves |
6:24 | |
| | |
Wave Characteristics |
7:24 | |
| | |
| Amplitude and Wavelength |
7:25 | |
| | |
| Wave Speed (v) |
10:13 | |
| | |
| Period (T) |
11:02 | |
| | |
| Frequency (f) |
12:33 | |
| | |
| v = λf |
14:51 | |
| | |
Wave Equation |
16:15 | |
| | |
| Wave Equation |
16:16 | |
| | |
| Angular Wave Number |
17:34 | |
| | |
| Angular Frequency |
19:36 | |
| | |
Example 1: CPU Frequency |
24:35 | |
| | |
Example 2: Speed of Light, Wavelength, and Frequency |
26:11 | |
| | |
Example 3: Spacing of Grooves |
28:35 | |
| | |
Example 4: Wave Diagram |
31:21 | |
| |
Waves, Cont. |
52:57 |
| | |
Intro |
0:00 | |
| | |
Superposition |
0:38 | |
| | |
| Superposition |
0:39 | |
| | |
Interference |
1:31 | |
| | |
| Interference |
1:32 | |
| | |
| Visual Example: Two Positive Pulses |
2:33 | |
| | |
| Visual Example: Wave |
4:02 | |
| | |
| Phase of Cycle |
6:25 | |
| | |
Phase Shift |
7:31 | |
| | |
| Phase Shift |
7:32 | |
| | |
Standing Waves |
9:59 | |
| | |
| Introduction to Standing Waves |
10:00 | |
| | |
| Visual Examples: Standing Waves, Node, and Antinode |
11:27 | |
| | |
| Standing Waves and Wavelengths |
15:37 | |
| | |
| Standing Waves and Resonant Frequency |
19:18 | |
| | |
Doppler Effect |
20:36 | |
| | |
| When Emitter and Receiver are Still |
20:37 | |
| | |
| When Emitter is Moving Towards You |
22:31 | |
| | |
| When Emitter is Moving Away |
24:12 | |
| | |
| Doppler Effect: Formula |
25:58 | |
| | |
Example 1: Superposed Waves |
30:00 | |
| | |
Example 2: Superposed and Fully Destructive Interference |
35:57 | |
| | |
Example 3: Standing Waves on a String |
40:45 | |
| | |
Example 4: Police Siren |
43:26 | |
| | |
Example Sounds: 800 Hz, 906.7 Hz, 715.8 Hz, and Slide 906.7 to 715.8 Hz |
48:49 | |
| |
Sound |
36:24 |
| | |
Intro |
0:00 | |
| | |
Speed of Sound |
1:26 | |
| | |
| Speed of Sound |
1:27 | |
| | |
Pitch |
2:44 | |
| | |
| High Pitch & Low Pitch |
2:45 | |
| | |
| Normal Hearing |
3:45 | |
| | |
| Infrasonic and Ultrasonic |
4:02 | |
| | |
Intensity |
4:54 | |
| | |
| Intensity: I = P/A |
4:55 | |
| | |
| Intensity of Sound as an Outwardly Radiating Sphere |
6:32 | |
| | |
Decibels |
9:09 | |
| | |
| Human Threshold for Hearing |
9:10 | |
| | |
| Decibel (dB) |
10:28 | |
| | |
| Sound Level β |
11:53 | |
| | |
Loudness Examples |
13:44 | |
| | |
| Loudness Examples |
13:45 | |
| | |
Beats |
15:41 | |
| | |
| Beats & Frequency |
15:42 | |
| | |
| Audio Examples of Beats |
17:04 | |
| | |
Sonic Boom |
20:21 | |
| | |
| Sonic Boom |
20:22 | |
| | |
Example 1: Firework |
23:14 | |
| | |
Example 2: Intensity and Decibels |
24:48 | |
| | |
Example 3: Decibels |
28:24 | |
| | |
Example 4: Frequency of a Violin |
34:48 | |
| |
Light |
19:38 |
| | |
Intro |
0:00 | |
| | |
The Speed of Light |
0:31 | |
| | |
| Speed of Light in a Vacuum |
0:32 | |
| | |
| Unique Properties of Light |
1:20 | |
| | |
Lightspeed! |
3:24 | |
| | |
| Lightyear |
3:25 | |
| | |
Medium |
4:34 | |
| | |
| Light & Medium |
4:35 | |
| | |
Electromagnetic Spectrum |
5:49 | |
| | |
| Electromagnetic Spectrum Overview |
5:50 | |
| | |
Electromagnetic Wave Classifications |
7:05 | |
| | |
| Long Radio Waves & Radio Waves |
7:06 | |
| | |
| Microwave |
8:30 | |
| | |
| Infrared and Visible Spectrum |
9:02 | |
| | |
| Ultraviolet, X-rays, and Gamma Rays |
9:33 | |
| | |
So Much Left to Explore |
11:07 | |
| | |
| So Much Left to Explore |
11:08 | |
| | |
Example 1: How Much Distance is in a Light-year? |
13:16 | |
| | |
Example 2: Electromagnetic Wave |
16:50 | |
| | |
Example 3: Radio Station & Wavelength |
17:55 | |
| VII. Thermodynamics |
| |
Fluids |
42:52 |
| | |
Intro |
0:00 | |
| | |
Fluid? |
0:48 | |
| | |
| What Does It Mean to be a Fluid? |
0:49 | |
| | |
Density |
1:46 | |
| | |
| What is Density? |
1:47 | |
| | |
| Formula for Density: ρ = m/V |
2:25 | |
| | |
Pressure |
3:40 | |
| | |
| Consider Two Equal Height Cylinders of Water with Different Areas |
3:41 | |
| | |
| Definition and Formula for Pressure: p = F/A |
5:20 | |
| | |
Pressure at Depth |
7:02 | |
| | |
| Pressure at Depth Overview |
7:03 | |
| | |
| Free Body Diagram for Pressure in a Container of Fluid |
8:31 | |
| | |
| Equations for Pressure at Depth |
10:29 | |
| | |
Absolute Pressure vs. Gauge Pressure |
12:31 | |
| | |
| Absolute Pressure vs. Gauge Pressure |
12:32 | |
| | |
| Why Does Gauge Pressure Matter? |
13:51 | |
| | |
Depth, Not Shape or Direction |
15:22 | |
| | |
| Depth, Not Shape or Direction |
15:23 | |
| | |
Depth = Height |
18:27 | |
| | |
| Depth = Height |
18:28 | |
| | |
Buoyancy |
19:44 | |
| | |
| Buoyancy and the Buoyant Force |
19:45 | |
| | |
Archimedes' Principle |
21:09 | |
| | |
| Archimedes' Principle |
21:10 | |
| | |
Wait! What About Pressure? |
22:30 | |
| | |
| Wait! What About Pressure? |
22:31 | |
| | |
Example 1: Rock & Fluid |
23:47 | |
| | |
Example 2: Pressure of Water at the Top of the Reservoir |
28:01 | |
| | |
Example 3: Wood & Fluid |
31:47 | |
| | |
Example 4: Force of Air Inside a Cylinder |
36:20 | |
| |
Intro to Temperature & Heat |
34:06 |
| | |
Intro |
0:00 | |
| | |
Absolute Zero |
1:50 | |
| | |
| Absolute Zero |
1:51 | |
| | |
Kelvin |
2:25 | |
| | |
| Kelvin |
2:26 | |
| | |
Heat vs. Temperature |
4:21 | |
| | |
| Heat vs. Temperature |
4:22 | |
| | |
Heating Water |
5:32 | |
| | |
| Heating Water |
5:33 | |
| | |
Specific Heat |
7:44 | |
| | |
| Specific Heat: Q = cm(∆T) |
7:45 | |
| | |
Heat Transfer |
9:20 | |
| | |
| Conduction |
9:24 | |
| | |
| Convection |
10:26 | |
| | |
| Radiation |
11:35 | |
| | |
Example 1: Converting Temperature |
13:21 | |
| | |
Example 2: Calories |
14:54 | |
| | |
Example 3: Thermal Energy |
19:00 | |
| | |
Example 4: Temperature When Mixture Comes to Equilibrium Part 1 |
20:45 | |
| | |
Example 4: Temperature When Mixture Comes to Equilibrium Part 2 |
24:55 | |
| |
Change Due to Heat |
44:03 |
| | |
Intro |
0:00 | |
| | |
Linear Expansion |
1:06 | |
| | |
| Linear Expansion: ∆L = Lα(∆T) |
1:07 | |
| | |
Volume Expansion |
2:34 | |
| | |
| Volume Expansion: ∆V = Vβ(∆T) |
2:35 | |
| | |
Gas Expansion |
3:40 | |
| | |
| Gas Expansion |
3:41 | |
| | |
The Mole |
5:43 | |
| | |
| Conceptual Example |
5:44 | |
| | |
| The Mole and Avogadro's Number |
7:30 | |
| | |
Ideal Gas Law |
9:22 | |
| | |
| Ideal Gas Law: pV = nRT |
9:23 | |
| | |
| p = Pressure of the Gas |
10:07 | |
| | |
| V = Volume of the Gas |
10:34 | |
| | |
| n = Number of Moles of Gas |
10:44 | |
| | |
| R = Gas Constant |
10:58 | |
| | |
| T = Temperature |
11:58 | |
| | |
A Note On Water |
12:21 | |
| | |
| A Note On Water |
12:22 | |
| | |
Change of Phase |
15:55 | |
| | |
| Change of Phase |
15:56 | |
| | |
| Change of Phase and Pressure |
17:31 | |
| | |
| Phase Diagram |
18:41 | |
| | |
Heat of Transformation |
20:38 | |
| | |
| Heat of Transformation: Q = Lm |
20:39 | |
| | |
Example 1: Linear Expansion |
22:38 | |
| | |
Example 2: Explore Why β = 3α |
24:40 | |
| | |
Example 3: Ideal Gas Law |
31:38 | |
| | |
Example 4: Heat of Transformation |
38:03 | |
| |
Thermodynamics |
27:30 |
| | |
Intro |
0:00 | |
| | |
First Law of Thermodynamics |
1:11 | |
| | |
| First Law of Thermodynamics |
1:12 | |
| | |
Engines |
2:25 | |
| | |
| Conceptual Example: Consider a Piston |
2:26 | |
| | |
Second Law of Thermodynamics |
4:17 | |
| | |
| Second Law of Thermodynamics |
4:18 | |
| | |
Entropy |
6:09 | |
| | |
| Definition of Entropy |
6:10 | |
| | |
| Conceptual Example of Entropy: Stick of Dynamite |
7:00 | |
| | |
Order to Disorder |
8:22 | |
| | |
| Order and Disorder in a System |
8:23 | |
| | |
The Poets Got It Right |
10:20 | |
| | |
| The Poets Got It Right |
10:21 | |
| | |
Engines in General |
11:21 | |
| | |
| Engines in General |
11:22 | |
| | |
Efficiency |
12:06 | |
| | |
| Measuring the Efficiency of a System |
12:07 | |
| | |
Carnot Engine ( A Limit to Efficiency) |
13:20 | |
| | |
| Carnot Engine & Maximum Possible Efficiency |
13:21 | |
| | |
Example 1: Internal Energy |
15:15 | |
| | |
Example 2: Efficiency |
16:13 | |
| | |
Example 3: Second Law of Thermodynamics |
17:05 | |
| | |
Example 4: Maximum Efficiency |
20:10 | |
| VIII. Electricity |
| |
Electric Force & Charge |
41:35 |
| | |
Intro |
0:00 | |
| | |
Charge |
1:04 | |
| | |
| Overview of Charge |
1:05 | |
| | |
| Positive and Negative Charges |
1:19 | |
| | |
A Simple Model of the Atom |
2:47 | |
| | |
| Protons, Electrons, and Neutrons |
2:48 | |
| | |
Conservation of Charge |
4:47 | |
| | |
| Conservation of Charge |
4:48 | |
| | |
Elementary Charge |
5:41 | |
| | |
| Elementary Charge and the Unit Coulomb |
5:42 | |
| | |
Coulomb's Law |
8:29 | |
| | |
| Coulomb's Law & the Electrostatic Force |
8:30 | |
| | |
| Coulomb's Law Breakdown |
9:30 | |
| | |
Conductors and Insulators |
11:11 | |
| | |
| Conductors |
11:12 | |
| | |
| Insulators |
12:31 | |
| | |
Conduction |
15:08 | |
| | |
| Conduction |
15:09 | |
| | |
| Conceptual Examples |
15:58 | |
| | |
Induction |
17:02 | |
| | |
| Induction Overview |
17:01 | |
| | |
| Conceptual Examples |
18:18 | |
| | |
Example 1: Electroscope |
20:08 | |
| | |
Example 2: Positive, Negative, and Net Charge of Iron |
22:15 | |
| | |
Example 3: Charge and Mass |
27:52 | |
| | |
Example 4: Two Metal Spheres |
31:58 | |
| |
Electric Fields & Potential |
34:44 |
| | |
Intro |
0:00 | |
| | |
Electric Fields |
0:53 | |
| | |
| Electric Fields Overview |
0:54 | |
| | |
| Size of q2 (Second Charge) |
1:34 | |
| | |
| Size of q1 (First Charge) |
1:53 | |
| | |
| Electric Field Strength: Newtons Per Coulomb |
2:55 | |
| | |
Electric Field Lines |
4:19 | |
| | |
| Electric Field Lines |
4:20 | |
| | |
| Conceptual Example 1 |
5:17 | |
| | |
| Conceptual Example 2 |
6:20 | |
| | |
| Conceptual Example 3 |
6:59 | |
| | |
| Conceptual Example 4 |
7:28 | |
| | |
Faraday Cage |
8:47 | |
| | |
| Introduction to Faraday Cage |
8:48 | |
| | |
| Why Does It Work? |
9:33 | |
| | |
Electric Potential Energy |
11:40 | |
| | |
| Electric Potential Energy |
11:41 | |
| | |
Electric Potential |
13:44 | |
| | |
| Electric Potential |
13:45 | |
| | |
| Difference Between Two States |
14:29 | |
| | |
| Electric Potential is Measured in Volts |
15:12 | |
| | |
Ground Voltage |
16:09 | |
| | |
| Potential Differences and Reference Voltage |
16:10 | |
| | |
| Ground Voltage |
17:20 | |
| | |
Electron-volt |
19:17 | |
| | |
| Electron-volt |
19:18 | |
| | |
Equipotential Surfaces |
20:29 | |
| | |
| Equipotential Surfaces |
20:30 | |
| | |
Equipotential Lines |
21:21 | |
| | |
| Equipotential Lines |
21:22 | |
| | |
Example 1: Electric Field |
22:40 | |
| | |
Example 2: Change in Energy |
24:25 | |
| | |
Example 3: Constant Electrical Field |
27:06 | |
| | |
Example 4: Electrical Field and Change in Voltage |
29:06 | |
| | |
Example 5: Voltage and Energy |
32:14 | |
| |
Electric Current |
29:12 |
| | |
Intro |
0:00 | |
| | |
Electric Current |
0:31 | |
| | |
| Electric Current |
0:32 | |
| | |
| Amperes |
1:27 | |
| | |
Moving Charge |
1:52 | |
| | |
| Conceptual Example: Electric Field and a Conductor |
1:53 | |
| | |
| Voltage |
3:26 | |
| | |
Resistance |
5:05 | |
| | |
| Given Some Voltage, How Much Current Will Flow? |
5:06 | |
| | |
| Resistance: Definition and Formula |
5:40 | |
| | |
Resistivity |
7:31 | |
| | |
| Resistivity |
7:32 | |
| | |
| Resistance for a Uniform Object |
9:31 | |
| | |
Energy and Power |
9:55 | |
| | |
| How Much Energy Does It take to Move These Charges Around? |
9:56 | |
| | |
| What Do We Call Energy Per Unit Time? |
11:08 | |
| | |
| Formulas to Express Electrical Power |
11:53 | |
| | |
Voltage Source |
13:38 | |
| | |
| Introduction to Voltage Source |
13:39 | |
| | |
| Obtaining a Voltage Source: Generator |
15:15 | |
| | |
| Obtaining a Voltage Source: Battery |
16:19 | |
| | |
Speed of Electricity |
17:17 | |
| | |
| Speed of Electricity |
17:18 | |
| | |
Example 1: Electric Current & Moving Charge |
19:40 | |
| | |
Example 2: Electric Current & Resistance |
20:31 | |
| | |
Example 3: Resistivity & Resistance |
21:56 | |
| | |
Example 4: Light Bulb |
25:16 | |
| |
Electric Circuits |
52:02 |
| | |
Intro |
0:00 | |
| | |
Electric Circuits |
0:51 | |
| | |
| Current, Voltage, and Circuit |
0:52 | |
| | |
Resistor |
5:05 | |
| | |
| Definition of Resistor |
5:06 | |
| | |
| Conceptual Example: Lamps |
6:18 | |
| | |
| Other Fundamental Components |
7:04 | |
| | |
Circuit Diagrams |
7:23 | |
| | |
| Introduction to Circuit Diagrams |
7:24 | |
| | |
| Wire |
7:42 | |
| | |
| Resistor |
8:20 | |
| | |
| Battery |
8:45 | |
| | |
| Power Supply |
9:41 | |
| | |
| Switch |
10:02 | |
| | |
| Wires: Bypass and Connect |
10:53 | |
| | |
| A Special Not in General |
12:04 | |
| | |
| Example: Simple vs. Complex Circuit Diagram |
12:45 | |
| | |
Kirchoff's Circuit Laws |
15:32 | |
| | |
| Kirchoff's Circuit Law 1: Current Law |
15:33 | |
| | |
| Kirchoff's Circuit Law 1: Visual Example |
16:57 | |
| | |
| Kirchoff's Circuit Law 2: Voltage Law |
17:16 | |
| | |
| Kirchoff's Circuit Law 2: Visual Example |
19:23 | |
| | |
Resistors in Series |
21:48 | |
| | |
| Resistors in Series |
21:49 | |
| | |
Resistors in Parallel |
23:33 | |
| | |
| Resistors in Parallel |
23:34 | |
| | |
Voltmeter and Ammeter |
28:35 | |
| | |
| Voltmeter |
28:36 | |
| | |
| Ammeter |
30:05 | |
| | |
Direct Current vs. Alternating Current |
31:24 | |
| | |
| Direct Current vs. Alternating Current |
31:25 | |
| | |
| Visual Example: Voltage Graphs |
33:29 | |
| | |
Example 1: What Voltage is Read by the Voltmeter in This Diagram? |
33:57 | |
| | |
Example 2: What Current Flows Through the Ammeter When the Switch is Open? |
37:42 | |
| | |
Example 3: How Much Power is Dissipated by the Highlighted Resistor When the Switch is Open? When Closed? |
41:22 | |
| | |
Example 4: Design a Hallway Light Switch |
45:14 | |
| IX. Magnetism |
| |
Magnetism |
25:47 |
| | |
Intro |
0:00 | |
| | |
Magnet |
1:27 | |
| | |
| Magnet Has Two Poles |
1:28 | |
| | |
| Magnetic Field |
1:47 | |
| | |
Always a Dipole, Never a Monopole |
2:22 | |
| | |
| Always a Dipole, Never a Monopole |
2:23 | |
| | |
Magnetic Fields and Moving Charge |
4:01 | |
| | |
| Magnetic Fields and Moving Charge |
4:02 | |
| | |
Magnets on an Atomic Level |
4:45 | |
| | |
| Magnets on an Atomic Level |
4:46 | |
| | |
| Evenly Distributed Motions |
5:45 | |
| | |
| Unevenly Distributed Motions |
6:22 | |
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Current and Magnetic Fields |
9:42 | |
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| Current Flow and Magnetic Field |
9:43 | |
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| Electromagnet |
11:35 | |
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Electric Motor |
13:11 | |
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| Electric Motor |
13:12 | |
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Generator |
15:38 | |
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| A Changing Magnetic Field Induces a Current |
15:39 | |
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Example 1: What Kind of Magnetic Pole must the Earth's Geographic North Pole Be? |
19:34 | |
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Example 2: Magnetic Field and Generator/Electric Motor |
20:56 | |
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Example 3: Destroying the Magnetic Properties of a Permanent Magnet |
23:08 | |