9. A 15kg mass is lifted upward at a constant speed to a height of 22 m. Calculate the work done by the lifting force.

At very high pressures, gases become and will eventually a) more dense; become hotter b) more dense; change to a liquid or solid c) less dense; combust d) less dense; turn into a liquid

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.

The frequency of the fundamental of the guitar string is 320 hz. at what speed v do waves move along that string?