Be sure to show all 4 steps for each of the problems below.
1. What is the potential energy acquired by a 23 kg paint bucket when it is placed on a
ladder 4 m above the ground? What is the potential energy of the bucket when
it is 10 m above the ground ?

Wavelength of 125 meters is moving at a speed of 10 m/s. what is it's frequency?

Smallest intensity of a stimulus that you can detect 50 percent of the time is

Abumper car with a mass of 250 kg is traveling at a speed of 4 m/s. this bumper car collides and sticks to a second bumper car with a mass of 250 kg, which is initially at rest. what is the final speed of these two bumper cars after the collision, assuming they remain stuck together?