A vibration that produces a wave takes 0.5 seconds to complete. What is the frequency of the wave?
A) 0.25 Hz
B) 0.5 Hz
C) 2 Hz
D) 4 Hz

What is the order of the moon, earth, and sun in a lunar eclipse and a solar eclipse?

A500g object falls off a cliff and losers 100 j from its gravitational potential energy store. if the gravitational field strength g=9.8n/kg, how high is the cliff?

In which of the following cases is work being done on an object? question 2 options: pulling a trailer up a hill carrying a box down a corridor suspending a heavy weight with a strong chain pushing against a locked door