What is the net force acting on the piano?
11,500 N
-11,500 N
500 N
-500 N

Estimate the schwarzschild radius (in kilometers) for a mini-black hole formed when a superadvanced civilization decides to punish you (unfairly) by squeezing you until you become so small that you disappear inside your own event horizon. (assume that the your weight is 50 kg)

The potential energy for a mass on a spring is proportional to the square of which of these quantities? a. mass b. frequency c. period d. displacement e. velocity

How many joules will be lost by 150 g of water if it is cooled from 90oc to 5oc?