If a 60-kilogram person climbs a 10-meter tall staircase in 6 seconds, how much power did they generate in

climbing the stairs? Show work (2 pts)

a. 600 W

b. 6 W

c. 600 J

d. 100 J

e. 1,000 W

The of a machine determines its "usefulness." a. input force b. output force c. mechanical advantage

The speed of sound in ice, water, and steam is shown. what best explains the speed of sound in different states of matter? sound travels fastest in ice because energy is easier to transfer when the molecules are close together. sound travels slowest in steam because the sound has to move around the gas molecules that are far apart. sound travels fastest in ice because the temperature of solids is always greater, so the heat transfers the sound energy. sound travels slowest in steam because the pressure is so great the sound cannot travel though the steam particles.

Agroup of monkeys is trying to cross the river in a rowboat. the maximum buoyant force on the rowboat is 2,000 n. the weight of the rowboat is 1,000 n. each monkey has a weight of 150 n. how many monkeys can safely cross in the rowboat at one time? explain your reasoning, including any calculations you used to find the answer.