Hardness may be defined as the resistance of a material to scratching.

a. True

b. False

If a car accelerated from 5 m/s to 25 m/s in 10 seconds what is it's acceleration?

A sound wave is a transverse wave surface wave longitudinal wave planetary wave

A ferris wheel is an example of the wheel and axle type of simple machine

A proton (? p = + ?, mp = 1.0 u; where u = unified mass unit ≃ 1.66 * 10-27kg), a deuteron (? = + ?, m? = 2.0 u) and an alpha particle (? = + 2?, m? = 4.

White light enters a glass prism, but the color components of the light are observed to emerge from the prism.

A set of data is collected from a simple circuit with a 20 resistor and is represented in the table

A skydiver of mass m jumps from a hot air balloon and falls a distance d before reaching a terminal velocity of magnitude v. Assume that the magnitude of the acceleration due to gravity is g. a.

8. What happens to force when mass is increased?

Give an example of ionic and covalent bond, and explain and make an example for each.

Which of these is the best reason for proper nutrition? A. To ensure that you will be skinny B. To protect yourself against certain diseases C. To improve your intelligence D. To ensure that you will get good grades