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From the extinction of the dinosaurs to humanity.

Overview of fertilisation and early human development. From conception leading to a zygote to blastocyst, embryo and fetus.

Figuring out the acceleration of ice down a plane made of ice.

Determining how fast something will be traveling upon impact when it is released from a given height. 

Explore the various forces acting on a block sitting on an inclined plane. Learn how to break the force of gravity into two components - one perpendicular to the ramp and one parallel to the ramp. Finally, using geometry and trigonometry, learn how to calculate the magnitude of each component of force that is acting on the block.

This video explains how to solve inequalities.

Instantaneous speed is a measurement of how fast an object is moving at that particular moment. Instantaneous velocity is a vector quantity that includes both the speed and the direction in which the object is moving. Learn how to find an object’s instantaneous speed or velocity in three ways - by using calculus, by looking at the slope of a given point on a graph of an object’s rate vs. time, or by using kinematic formulas if the object’s acceleration is constant. 

The division and multiplication of integers
Order of operations

Scalars and vectors are two kinds of quantities that are used in physics and math. Scalars are quantities that only have magnitude (or size), while vectors have both magnitude and direction. Explore some examples of scalars and vectors, including distance, displacement, speed, and velocity.

This video introduces you to the concept of ratios.