Sayfa $\frac{79}{769}$

$2\mathrm{.}4.$ An electric motor under steady load draws $9\mathrm{.}7$ amperes at $110$ volts, delivering $1\mathrm{.}25(hp)$ of mechanical energy. What is the rate of heat transfer from the motor, in $kW?$

$2\mathrm{.}5.$ An electric hand mixer draws $1\mathrm{.}5$ amperes at $110$ volts. It is used to mix $1kg$ of cookie dough for $5$ minutes. After mixing, the temperature of the cookie dough is found to have increased by $5C.$ If the heat capacity of the dough is $4\mathrm{.}2kJ*k{g}^{-1}*K^{-1},$ what fraction of the electrical energy used by the mixer is converted to internal energy of the dough? Discuss the fate of the remainder of the energy.

$2\mathrm{.}6.$ One mole of gas in a closed system undergoes a four$-$step thermodynamic cycle. Use the data given in the following table to determine numerical values for the missing quantities indicated by question marks.

$\backslash$table$[[,,,],[$Step$,\frac{U^t}{J},Q^3,\frac{W}{J}$