Which  of  the  following  shows  kinetic  energy  being  converted  into  potential  energy? a)a  boulder  rolling  across  the  groundb)a  rock  being  tossed  high  into  the  airc)a  boulder  falling  off  the  edge  of  a  cliffd) a  rock  sitting  in  the  grass

One day, after pulling down your window shade, you notice that sunlight is passing through a pinhole in the shade and making a small patch of light on the far wall. you see that the patch of light seems to be a circular diffraction pattern. it appears that the central maximum is about 1 cm across and you estimate that the distance from the window shade to the wall is about 3 m. what is (a) the average wavelength of sunlight? (b) the diameter of the pinhole?

Will give brainliest! jay rides his 2.0-kg skateboard. he is moving at speed 5.8 m/s when he pushes off the board and continues to move forward in the air at 5.4 m/s. the board now goes forward at 13 m/s.a. determine jay’s mass.b. determine the change in the internal energy of the system during this process.(express your answer to two significant figures and include the appropriate units.)

The ph is the a.independent variable b.the dependent variable c.control group