As the kinetic energy of the molecules in a substance increases, the

a. temperature of the substance increases.

b. temperature of the substance decreases.

c. potential energy of the substance changes.

d. temperature remains the same.

What are similarities and differences between refraction, reflection, diffraction and absorption?

Diverging mirrors and lenses always produce images

One hazard of space travel is debris left by previous missions. there are several thousand masses large enough to detect by radar orbiting the earth, but there are far greater numbers of very small masses such as flakes of paint. calculate the force exerted by a 0.110 mg chip of paint that strikes a space shuttle window at a relative speed of 5.00 ✕ 103 m/s and sticks, given the collision lasts 6.00 ✕ 10-8 s. such a collision chipped the window of the ill-fated challenger in june 1983, causing $50,000 of damage.