3. A person holds a 0.300 kg pomegranate at the top of a tower that is 96 m high. Another person holds a 0.800 kg melon next to an open window 32 m up the tower.
a. Draw a diagram to illustrate the situation. (1 point)
b. Calculate the gravitational potential energies of the melon and the pomegranate.
Which one has more potential energy? (2 points)c. At what height would the
pomegranate have the same potential energy as the melon? (1 point)d. If they are
dropped from their original heights at the same time, will the melon or the pomegranate
hit the ground first? Explain. (1 point)

An ideal gas is held in a container at constant volume. initially, its temperature is 5 degrees c and its pressure is 1.2 atm. what is its pressure when its temperature is 43 degrees c? answer in units of atm

Search coils and credit cards. one practical way to measure magnetic field strength uses a small, closely wound coil called a search coil. the coil is initially held with its plane perpendicular to a magnetic field. the coil is then either quickly rotated a quarter-turn about a diameter or quickly pulled out of the field. (a) derive the equation relating the total charge q that flows through a search coil to the magnetic-field magnitude b. the search coil has n turns, each with area a, and the flux through the coil is decreased from its initial maximum value to zero in a time ∆t. the resistance of the coil is r, and the total charge is q = i∆t, where i is the average current induced by the change in flux. (b) in a credit card reader, the magnetic strip on the back of a credit card is rapidly “swiped” past a coil within the reader. explain, using the same ideas that underlie the operation of a search coil, how the reader can decode the information stored in the pattern of magnetization on the strip. (c) is it necessary that the credit card be “swiped” through the reader at exactly the right speed? why or why not?

How is sound energy produced a. vibrating objects b. objects being heated c. temperature differences d. stationary objects