Tag: temperature and heat
Questions Related to temperature and heat
Cooking utensils are made up of
$1\ kcal $ per hour of heat flowing through a rod of iron. When the rod is cut down to $4$ pieces then what will be the heat flowing through each piece having same differential temperature?
A metal rod of length $2m$ has cross sectional area $2A$ and as shown in figure$.$ The ends are maintained at temperature $100^0C$ and $70^0C$.$ The tem[temperature at middle point C is
The thermal conductivity of a rod depends on :
The heat capacity of a metal is 4200 J/k. Its water equivalent is-
A steel drill is making 180 revolutions per minute under a constant couple of 5 Nm. If it drills a hole in 7 seconds in a steel block of mass 600 gm, the rise in temperature of the block is: (S=0.I cal/gm/K)
Three copper blocks of masses ${ M } _{ 1 },{ M } _{ 2 }$ and ${ M } _{ 3 }$ kg respectively are brought into thermal contact till they reach equilibrium. Before contact. they were at ${ T } _{ 1 },{ T } _{ 2 },{ T } _{ 3 }$ $\left( { T } _{ 1 }>{ T } _{ 2 }>{ T } _{ 3 } \right) .$ Assuming there is no heat loss to the surrounding, the equilibrium temperature T (s is specitc heat of copper)
Two walls of thickness $d _ { 1 }$ and $d _ { 2 }$ thermal conductivities $K _ { 1 }$ and $K _ { 2 }$ are in contact. In the steady state if the temperatures at the outer surfaces are $T _ { 1 }$ and $T _ { 2 },$ the temperature at the common wall will be
Two rods of length $\mathrm { d _ { 1 } } ,$ and $\mathrm { d _ { 2 } } ,$ and coefficient of thermal conductivities $\mathrm { K } _ { 1 }$ and $\mathrm { K } _ { 2 }$ are kept touching each other. Both have the same area of cross-section. The equivalent of thermal conductivity is
Three roads identical area of cross-section and made from the same metal from the sides of an isosceles triangle ABC, right angled at B. The points A and B are maintained at temperature T and $ \sqrt {2} T $ respectively. IN the steady state the temperature that only point C is $ T _c $ Assuming that only conduction takes place $ \frac {T _c}{T} is $