If pes represents the potential energy stored in a spring in kg•m^2/s^2 and x represents the change in the springs length from its equilibrium position im m what is the unit for the spring constant k in the formula PEs=1/2kx^2

Name at least one benefit for each type of scientific investigation.

What is the name of the upward force that enables a bird to fly? A. lift. B. Gravity. C. Air pressure. D. Flight path.

The lymphatic system produces eggs and protects the fetus.

A roller coaster moving down a hill is an example of what kind of energy

Pure water is a poor conductor of electricity. When sodium chloride (NaCl) is dissolved in water, however, the solution becomes a good conductor of electricity. Which of the following statements explains this change in conductivity? A.

The chemical reaction of oxygen with other substances is called A. erosion. B. oxidation. C. exfoliation. D. acidification.

Find the net charge of a system consisting of 6.16*106 electrons and 7.68*106 protons. Express your answer using three significant figures. Qnet = 2.43*10-13 C

A motorist is driving at 20m/s when she sees that a traffic light 200m ahead has just turned red. She knows that this light stays red for 15s, and she wants to reach the light just as it turns green again. It takes her 1.

Does sound move as a longitudinal or transverse wave in a medium?

Which configuration would produce an electric current? a. Rotate a coil of copper wire between two magnets. b. Connect a wire between a copper and zinc strip sitting in a beaker of water. c.