Apackage of aluminum foil contains 50. ft2 of foil, which weighs approximately 6.0 oz. aluminum has a density of 2.70 g/cm3. what is the approximate thickness of the foil in millimeters? express your answer to two significant figures and include the appropriate units.

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final

For waves in the ocean, the medium of the waves is a. air b. water c. energy d. a passing boat

Afisherman notices that his boat is moving up and down periodically, owing to waves on the surface of the water. it takes a time of 2.70 s for the boat to travel from its highest point to its lowest, a total distance of 0.700 m. the fisherman sees that the wave crests are spaced a horizontal distance of 6.50 m apart. a. how fast are the waves traveling? b. what is the amplitude a of each wave?