The chart shows the power ratings of 3 clothes dryers and the time needed to dry a load of 10 towels.

what is the difference in energy used between the dryer that uses the greatest amount of energy and the dryer that uses the least amount?

0.18 kwh
0.20 kwh
1.62 kwh
1.82 kwh

6–48 bananas are to be cooled from 24 to 138c at a rate of 215 kg/h by a refrigeration system. the power input to the refrigerator is 1.4 kw. determine the rate of cooling, in kj/ min, and the cop of the refrigerator. the specific heat of banana above freezing is 3.35 kj/kg·8c.

In a classical model of the hydrogen atom, the electron moves around the proton in a circular orbit of radius 0.053 nm. what is the electron's orbital frequency? what is the effective current of the electron?

Anika asks eva to roll a basketball and then a bowling ball to her. which requires more force to roll, and why?