6. A truck runs into a pile of sand, moving 0.80 m as it slows to a stop. The magnitude of the work that the sand does on the
truck is 6.0 X 10^5J. (a) Determine the average force that the
sand exerts on the truck. (b) Did the sand do positive or nega-
tive work? (c) How does the average force change if the stop-
ping distance is doubled? Indicate any assumptions you made.

The energy of a photon was found to be 3.38 × 10–19 j. planck’s constant is 6.63 × 10–34 j • s. which color of light corresponds to this photon?

Select the best definition for wavelength. the height of an oscillating electromagnetic wave the rate at which electromagnetic waves oscillate. the distance between two crests of an electromagnetic wave. the oscillations of electric and magnetic fields select the best definition for frequency. the oscillations of electric and magnetic fields. the height of an oscillating electromagnetic wave. the distance between two crests of an electromagnetic wave. the rate at which electromagnetic waves oscillate

Match each type of lever with the correct diagram. 1. first-class 2. third-class 3. second-class