A tank containing $20kg$ of water at is fitted with a stirrer that work to the water at the

rate of $.$ long does it take for the temperature of the water to rise to $30C$ if no heat is lost

from the water? For water, $CP=4\mathrm{.}18kJ*k{g}^{-1}*C^{-1}.$ amount of $7\mathrm{.}5kJ$ is added to a closed while its internal energy decreases by $12$

kJ$.$ How much energy is $l$ as work For a process causing the same change of state but for$$Fill in the given values you have, and we'll solve for the missing variable.$=\frac{m}{V}$

$$	$=$	$\text{density}$
$m$	$=$	$\text{mass}$
$V$	$=$	$\text{volume}$

which the work is zero, how much heat is transferred?

An electric hand mixer draws $1\mathrm{.}5$ at $110$ volts. It is used to mix $1kg$ of cookie dough for $5$

minutes. After mixing, the of the cookie dough is to have increased by $5C.$ t containing $20$ kg of at fitted with a stirrer that work to the water at the

rate of $0\mathrm{.}25$ kW$.$ How long does it take for the tmperature of the water to rise to $30\backslash$deg C if no heat is lost

from the water? For water, CP $=4\mathrm{.}18$ kJ$$kg$1$

$\backslash$deg C$1$ of the dough is $4\mathrm{.}2kJ*k{g}^{-1}*K^{-1},$ what fraction of the used by th mixer

internal of the dough? Discuss the fate of th