Dark matter is missing stars that have fallen from the sky.

true or false

Explain the changes in kinetic and potential energy that occur when using newton cradle

What value relates the speed of light in a vacuum to the speed of light in a given material? A) angle of incidence B) angle of refraction C) index of refraction D) index of reflection

Give an equation relating (f) and wavelength that best describes your observations

Calculate the kinetic energy in joules of a 10 g bullet moving in 300 m/s

How much work is needed to move an object from one position to another when both positions are located the same distance from the center of the earth

What do the group numbers mean on the periodic table?

A spring supporting a mass of 30 kg compresses 0.6 m. How far does the spring compress when it supports a mass of 10 kg? A. 0.1 m B. 0.2 m C. 1.2 m D. 1.8 m

Which statement best describes a solid?

Race car drivers must slow down as they make turns on the track. This is best explained by the law of inertia. Which statement best describes inertia for the car going around a turn? A) A body in motion stays in motion at the same speed.

What is is the ratio of the distance over which the force is applied to the distance over which the load is moved