Is energy absorbed or given off when an electron and a hole of a semi-conductor crystal

recombine? What are the forms of energy that can be absorbed or given off?

An electric car accelerates from rest to 30 m/s in 4.5 seconds. What is its acceleration?

A pumpkin weighs 5.4 pounds what is its mass in grams?

a model rocket is launched straight upward at 58.8 m/s, how long does it take for the rocket to reach its peak height?

What characterizes an elastic collision, but not an inelastic collision, in a closed system? A. Momentum is conserved B. Total energy is conserved C. Kinetic energy is conserved D. No external net force acts I think it is B.

What does the ear drum do when sound waves reach it?

List the different types of electromagnetic readiation (waves) in order from shortest wavelength to longest wavelength

Which way does the Coriolis effect deflect objects in the Northern Hemisphere To the south To the right To the left To the north

Let T be a linear transformation from a vector space V with dimension 11 onto a vector space W with dimension 7. What is the dimension of the nullspace of T?

What is the fundamental unit for measuring mass in the metric system?

Why are some craters on the moon bigger than others