Abattery consists of five dry cells connected in series. if the voltage developed by each cell is 1.5 v, the total voltage developed by the battery is
a. 7.5 v.
b. 1.5 v.
c. 5.0 v.
d. 0.3 v. the total voltage developed by the battery is
a. 7.5

Abookcase has a mass of 38 kg and the coefficient of friction between it and the floor is 0.82 what is the maximum force of friction between the bookcase and the floor a 372n b 305n c 412n d 449n

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.

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