Which of the following would have the same resistance as a copper wire that
is 4 m long and has a cross-sectional area of 0.066 cm? ?
o
a. a copper wire that is 8 m long and cross-sectional area of 0.132
cm2
o
b. a copper wire that is 2 m long and cross-sectional area of 0.132
cm2
o
c. a copper wire that is 1 m long and cross-sectional area of 0.022
cm?
o
d. a copper wire that is 6 m long and cross-sectional area of 0.022
cm2

Why are graphs useful when interpreting data

An ice-making machine inside a refrigerator operates in a carnot cycle. it takes heat from liquid water at 0.0 degrees celsius and rejects heat to a room at a temperature of 19.2 degrees celsius. suppose that liquid water with a mass of 76.3kg at 0.0 degrees celsius is converted to ice at the same temperature. take the heat of fusion for water to be l_f = 3.34*10^5 j/kg.how much energy e must be supplied to the device? express your answer in joules.

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.