"a spacecraft in outer space increases its velocity by firing its rockets. how can hot gases escaping from its rocket engine change the velocity of the craft when there is nothing in space for the gases to push against?

In a system, when potential energy decreases, then entropy also decreases. true false

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.

Specific heat refers to the amount of heat required to change 1 gram of a substance by degree(s) celsius