What describes what momentum is? a. Inertia in motion
b. Equals mass X velocity
c. Strength of the motion
d. All of the above

Which simple machine is not part of this compound machine? a. lever b. pulley c. inclined plane d. wheel and axle

Aparticle initially moving east with a speed of 20.0 m/s, experiences an acceleration of 3.95 m/s, north for a time of 8.00 s. what was the speed of the particle after this acceleration, in units of m/s? give the answer as a positive number.

What is the thinnest soap film (excluding the case of zero thickness) that appears black when illuminated with light with a wavelength of 480 ? the index of refraction of the film is 1.34, and there is air on both sides of the film. express your answer in nanometers. hint 1. how to approach th