A lazy tortoiseshell cat (4.6 kg) is sleeping soundly on a desk. It has a gravitational potential energy of 140 J even while doing absolutely nothing. What is the height of the desk?
30.4 m
14.3 m

9.7 m
3.1 m

Waves that cause the most damage during an earthquake are a. surface waves c. s waves b. p waves d. ocean waves

Which features on mars point to the possibility of liquid water on the planet? impact craters with sharp rims volcanic cones with craters gullies and stream-like channels mountain ranges with faults

If two students are running down the hall toward each other, trying to get to class, and they have the same mass and acceleration, what will happen when they collide? will their forces cancel out or will each one experience a reaction?