Visible light reaches Earth's surface while infrared light is trapped as heat. Which characteristic of Earth's atmosphere causes this to happen?
A. the hole in the ozone
B. the greenhouse effect
C. atmospheric pressure
D. the inversion layer

Abug is 12 cm from the center of a turntable that is rotating with a frequency of 45 rev/min . what minimum coefficient friction is required so that the bug stays on the turntable?

Which is an example of gaining a static charge by conduction? a) rubbing a balloon against your hair. b) shuffling your shoes across a carpet. c) bringing a charged rod near an electroscope. d) touching your car on a cold day and getting a shock.

Acar traveling at 22 m/s starts to decelerate steadily. it comes to a complete stop in 15 seconds. what is it’s acceleration?