Chapter 22 – Heat Transfer
A slab consists of two layers of different materials of the same thickness and having thermal conductivities K1 and K2. The equivalent thermal conductivity of the slab is
10
Sep
A slab consists of two layers of different materials of the same thickness and having thermal conductivities K1 and K2. The equivalent thermal conductivity of the slab is A slab consists of two layers of different materials of the same thickness and having thermal conductivities K1 and K2. The equivalent thermal conductivity of the slab [...]
A glass window conducts out a certain quantity of heat per second when the inside temperature is 10 C and the outside temperature is – 10 C. The same quantity of heat will be conducted in through the window per second when the inside temperature is – 43C and the outside temperature is
10
Sep
A glass window conducts out a certain quantity of heat per second when the inside temperature is 10 C and the outside temperature is – 10 C. The same quantity of heat will be conducted in through the window per second when the inside temperature is – 43C and the outside temperature is The temperature [...]
One end of a thermally insulated copper rod of length 1 m long and of 10 cm^(2) in X-section is immersed in boiling water (100 C) and the other in ice (0 C) . If K_(Cu) = 0.92 cal/cm/s/C and L_(ice) = 80 cal/g, the ice that will melt per minute is
10
Sep
One end of a thermally insulated copper rod of length 1 m long and of 10 cm^(2) in X-section is immersed in boiling water (100 C) and the other in ice (0 C) . If K_(Cu) = 0.92 cal/cm/s/C and L_(ice) = 80 cal/g, the ice that will melt per minute is The temperature gradient [...]
Two vessels A and B of different materials are similar in shape and size. The same quantity of ice filled in them gets melted in time t1 and t2 respectively. The ratio of thermal conductivities of A and B is
10
Sep
Two vessels A and B of different materials are similar in shape and size. The same quantity of ice filled in them gets melted in time t1 and t2 respectively. The ratio of thermal conductivities of A and B is The temperature gradient in a rod of 0.5 m long is 80 C/m. If the [...]
Two rods of the same material have diameters in the ratio 1:2 and the lengths in the ratio of 2:1. If the temperature difference between their ends is the same, then the ratio of heats conducted by them in a given time will be :
10
Sep
Two rods of the same material have diameters in the ratio 1:2 and the lengths in the ratio of 2:1. If the temperature difference between their ends is the same, then the ratio of heats conducted by them in a given time will be : then the ratio of heats conducted by them in a [...]
The temperature gradient in a rod of 0.5 m long is 80 C/m. If the temperature of hotter end of the rod is 30 C, then the temperature of the cooler end is
10
Sep
The temperature gradient in a rod of 0.5 m long is 80 C/m. If the temperature of hotter end of the rod is 30 C, then the temperature of the cooler end is The temperature gradient in a rod of 0.5 m long is 80 C/m. If the temperature of hotter end of the rod [...]
The two ends of uniform rod of thermal conductivity K are maintained at different but constant temperatures. The temperature gradient at any point on the rod is dl/dθ . The heat flow per unit time per unit cross section of the rod is l.
10
Sep
The two ends of uniform rod of thermal conductivity K are maintained at different but constant temperatures. The temperature gradient at any point on the rod is dl/dθ . The heat flow per unit time per unit cross section of the rod is l. 3. The work done in the process AB is September 10, [...]