A ball of mass 2 kg fallsfrom a rof that is 5 m above the ground. How much gravitational potential energy did the ball lose when it reached the ground, in units of joules? give your answer as a positive value

715 J of heat are transferred from a 1.30 kg aluminum block to a 0.800 kg iron block. Find the temperature change for the iron.

What situation primarily involves heat transfer by convection?

What factor does not contribute to "water stress" on the Earth?

What is the final temperature when 50 g of water at 20°c is mixed with 75 g of water at 60°c

Starting from rest, a dragster travels a straight 1/4 mi racetrack in 6.70 s with constant acceleration. What is its velocity when it crosses the finish line?

How is Electric current able to flow?

In a series circuit, loads which have the same voltage dropped across them will have?.

When a brick is dropped from the roof of a house, it lands on the ground with a speed v. What will the speed at ground level be for an identical brick dropped from a roof twice as high as the first one?

The scientific method begins with recognizing a problem. The recognized problem in this scenario is, "Why is the printer in the office not working?" Choose the hypotheses that are testable and from which an experiment can be formed.

The correctly balanced equation for H2O2 → H2O + O2 is