Videos [1–100 of 9495 videos]

02:09
Identifying the Optical Axis of a Curved Object

02:18
Identifying the Optical Axis of a Semicircular Object

04:11
Using Newton’s Second Law to Explain the Deceleration of a Moving Object

07:49
Adding Objects

10:34
Adding Zero

17:27
Angles of Intersecting Lines in a Circle

06:05
Calculating the Average Atomic Mass of a Lithium Sample from the Isotopes' Atomic Masses and Their Percentages in the Sample

03:19
Calculating the Change of the Volume of a Gas under Constant Pressure from the Change in Its Temperature

02:16
Calculating the Derivative at a Point

03:13
Circles

09:28
Comparing the Speed and Distance of Two Moving Bodies from Their Velocity–Time Graph

03:23
Computing Logarithmic Expressions Using Laws of Logarithms

01:15
Determining Whether Two Complex Numbers Are Conjugates

03:55
Differentiating a Combination of Root and Polynomial Functions Using the Product Rule

03:34
Differentiating Compositions of Polynomial and Root Functions Using the Chain Rule

03:06
Differentiating Reciprocal Trigonometric Functions Using the Chain Rule

03:17
Differentiating Root Functions Using the Chain Rule

03:47
Differentiating Root Functions Using the Chain Rule

05:26
Discussing the Continuity of a PiecewiseDefined Functions Involving Trigonometric Ratios at a Point

15:07
Electromotive Force and Internal Resistance

01:31
Estimating the Value of Logarithms Using Laws of Logarithms

01:16
Evaluating Algebraic Expressions Using Laws of Exponents

06:12
Evaluating the Rate of Change of a Radical Function at a Point

02:01
Finding the Area of a Rectangle given Its Dimensions as Decimal Numbers

02:34
Finding the Derivative of a Function Involving Trigonometric and Exponential Functions Using the Product Rule

02:04
Finding the Derivative of a Function Involving Trigonometric and Exponential Functions Using the Product Rule

03:53
Finding the Equation of the Tangent to the Curve of a Polynomial Function at a Given Point

02:30
Finding the Expression of a Function given the Expression of Its Slope and a Point on the Function Using Indefinite Integration

02:22
Finding the First and Second Derivatives of a Function Using the Power Rule

03:30
Finding the First Derivative of the Product of Two Trigonometric Functions at a Point

03:39
Finding the First Derivative of the Quotient of Trigonometric and Linear Functions Using the Quotient Rule

03:02
Finding the Limit of a Quotient of Trigonometric and Linear Functions at a Point

02:31
Finding the Measure of an Inscribed Angle given the Diameter of the Circle and the Measure of Another Inscribed Angle

01:12
Finding the Modulus of Complex Numbers

02:02
Finding the Modulus of the Sum of Two Complex Numbers in Algebraic Form

03:45
Finding the Rate of Change of a Reciprocal Function at a Given xValue

03:33
Finding the Second Derivative of a Function

06:19
Finding the Third Derivative of Trigonometric Functions Using the Product Rule

01:17
Finding the Value of the Constant in a Quadratic Function If It Passes through a Given Point

04:45
Finding Unknown Coefficients in a Polynomial Function given the Equation of Its Tangent at a Given Point

07:30
Identifying the Ray of the Greatest Refraction Angle in a Concave Lens

11:01
Making 10

12:24
Making 6 and 7

11:40
Matter Waves

10:28
Missing Numbers in Addition Equations

02:18
Multiplying Decimal Numbers

17:39
Quadratic Functions in Different Forms

10:07
Relating Addition to Subtraction: Numbers up to 10

01:03
Solving Quadratic Equations

01:29
Solving Quadratic Equations by Taking Square Roots

00:50
Solving Simple Quadratic Equations

10:07
Subtracting Ones from Teen Numbers: Making Ten

11:46
Subtracting Zero and All

13:12
Subtraction Equations

00:59
The Formula for the Modulus of a Complex Number

12:09
The Mode of a Data Set

03:33
Thermal Radiation

04:28
Understanding How Heat Absorption and Emission Relates to Temperature Change

01:34
Using Experimental Probability to Determine the Expected Number of Outcomes of an Event

12:29
Word Problems: Putting Objects Together

04:41
Writing a Decimal in Standard Form

11:10
Adding and Subtracting Numbers up to 10

09:12
Adding OneDigit Numbers by Making Ten

11:23
Addition Equations

10:11
Comparing Groups of Objects: More Than

02:57
Determining the Complement of intersection of Two Events

12:24
Drawing Conclusions

04:24
Equilibrium of Bodies Resting on Rough Inclined Planes

04:37
Estimating the Activation Energy of a Reaction from Temperature and Reaction Rate

01:45
Evaluating Numerical Logarithmic Expressions Using Laws of Logarithms

04:22
Finding the Area of a Trapezoid

03:53
Finding the Area of the Triangle Whose Vertices Are the Vertex and the Real Roots of a Quadratic Function given Its Graph

05:46
Finding the Equation of the Tangent to a Curve Defined Implicitly at a Given Point Using Implicit Differentiation

03:24
Finding the Equation of the Tangent to the Curve of a Function at a Point

07:03
Finding the Friction Force Acting on a Body on a Rough Inclined Plane Where the Body Is about to Move down the Plane

06:01
Finding the Magnitude and Direction of Friction of a Body Resting in Equilibrium on an Inclined Rough Surface While an Inclined Force Is Acting on It

02:23
Finding the Number of Ways to Choose 𝑛 out of 𝑚 Things

02:52
Finding the Number of Ways to Choose 𝑛 out of 𝑚 Things

01:35
Finding the Solution Set of Exponential Equations Using Logarithms

01:26
Finding the Surface Area of a Prism

15:44
Inscribed Angles in a Circle

08:17
Making 11, 12, and 13

10:02
Making 17, 18, and 19

02:07
Multiplying a Decimal Number by Another

12:54
Parts and Wholes

16:26
Photon Momentum

16:54
Slope and Rate of Change

04:23
Studying the Equilibrium of a Body Resting on a Rough Inclined Plane in Different Conditions

14:55
Symmetry in 3D Shapes

05:58
The Coefficient of Friction between a Body and a Rough Plane

16:46
The Pythagorean Theorem in 3D

01:07
Using Experimental Probability to Determine the Expected Number of Outcomes of an Event

01:43
Using Experimental Probability to Determine the Expected Number of Outcomes of an Event

06:42
Using Implicit Differentiation and the Product Rule to Find the Value of an Expression Containing the First and Second Derivatives

03:18
Using the Binomial Theorem

08:29
Word Problems: Taking Apart

02:53
Solving Word Problem Involving Proportions

02:47
Using a System of Linear Equations to Find Two Quantities given Their Difference and Ratio

01:41
Calculating the Frequency of a Diving Board

01:42
Calculating Wave Frequency from Distance–Time Graph