Does a rolling ball on a level floor have PE or KE? Explain.

What influences the velocity of the jet stream

A diffraction grating is illuminated with yellow light at normal incidence. The pattern seen on a screen behind the grating consists of three yellow spots, one at zero degrees (straight through) and one each at ±45°.

You are camping in the breathtaking mountains if Colorado. You spy an unopened diet soda can floating motionless below the surface of a lake. What is the direction and amount of force the water exerts on it? A. Zero B.

A piece of solid copper, at 10oC, is dropped into a graduated cylinder of 100°C water. Which statement BEST describes the change in heat energy in this system? A) Both water and copper temperatures decrease.

A supply bag is dropped from a rescue plane. After the bag falls for 3.2 seconds, what is the velocity of the bag? How far has the bag fallen? I know the answer to the first one is - 19.6 but im struggling to figure out the second

17. Suppose you were standing on a scale in an elevator in free fall. What would the scale read? 18. Explain why the feeling weightlessness in free fall is not the same as truly being weightless. 19.

The momentum of an isolated system is conserved A) only in inelastic collisions. B) only in elastic collisions. C) in both elastic and inelastic collisions

Which of the following is not an ethical consideration of social research? a. protecting the anonymity of the participants b. creating a safe environment for research c. using research to reform society d.

Which event occurs after erosion of earth's surface

In your own words, compare and contrast transverse and longitudinal waves. Be sure to include at least one similarity and one difference.