A 50n box is lifted 2 meters in 3 seconds.

a. how much work is done for the box?

b. is the work or positive?

c. how much power is needed to lift the box?

Which environmental change would most likely result in bullfrog offspring that are able to store more water than bullfrogs in previous generations?

A bird sitting high in a tree is an example of an object with what type of energy

5. In order for an F-18 fighter jet to take off from an aircraft carrier, it needs to reach a speed of 73 m/s by quickly accelerating down a 90 m long runway.

As the caterpillar climbs, its potential energy is increasing. what source of energy has been used to effect this change in potential energy?

During World War 2, there were some cases where the crew fell out of burning aircraft without a parachute and survived the fall. Assume that the crew member reached a constant terminal speed of 126.1 km/hr prior to hitting a stack of loose hay.

What happens to the resistance of a wire as it gets wet

How much mass is needed for a black hole?

What is one benefit of a switch in a circuit?

When you see a straw in a glass of water it looks bent why is this?

Compare the energy and wavelength of a microwave to the energy of a gamma ray.