King Kong carries Fay Wray up the 321-meter high Empire State Building. At the top of the skyscraper, Fay Wray's shoe falls from her foot.
Neglecting air resistance, how long does it take for the shoe to reach the ground?
O 8.09 sec
O 12.35 sec
O 56.21 sec
O 4.30 sec

Awave is produced in a rope. the wave has a speed of 33 m/s and a frequency of 22 hz.

(a) calculate the number of electrons in a small, electrically neutral silver pin that has a mass of 10.0 g. silver has 47 electrons per atom, and its molar mass is 107.87 g/mol. (b) imagine adding electrons to the pin until the negative charge has the very large value 1.00 mc. how many electrons are added for every 109 electrons already present

1. jay fills a wagon with sand (about 20 kg) and pulls it with a rope 30 m along the beach. he holds the rope 25° above the horizontal. the rope exerts a 20-n tension force on the wagon. how much work does the rope do on the wagon?