In the picture below, how could the man make it easier to lift the stone with the lever?
a) use two boards instead of one board.
b) move the fulcrum farther away from the stone.
c) move the stone to farthest end of the board.
d) move the fulcrum closer to the stone.

A0.750 kg aluminum pan is removed from the stove and plunged into a sink filled with 10.0 kg of water at 293 k. the water temperature quickly rises to 297 k. what was the initial temperature of the aluminum pan? the specific heat of aluminum is ca = 900 j/(kgk) and water is cw = 4190 j/(kgk)