Electrical appliances are marked with a rating in watts (W) and volts (V) .For example an electric bulb is marked 100W-220W . 1/ what information does it represent 2/ what amount of current is required for the bulb to work?

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