Part 1
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 change in the entropy of a 1 mole of ideal gas which went through an isothermal process from an initial state (P1,V1,T) to the final state (P2,V2,T) is equal to
10
Sep
The change in the entropy of a 1 mole of ideal gas which went through an isothermal process from an initial state (P1,V1,T) to the final state (P2,V2,T) is equal to 'T' is equal to T) to the final state (P2 The change in the entropy of a 1 mole of ideal gas which went [...]
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, [...]
In an ideal refrigerator, heat from inside at 277 K is transformed to a room at 300K. How many joules of heat will be delivered to the room for each joule of electrical energy consumed ?
10
Sep
In an ideal refrigerator, heat from inside at 277 K is transformed to a room at 300K. How many joules of heat will be delivered to the room for each joule of electrical energy consumed ? heat from inside at 277 K is transformed to a room at 300K. How many joules of heat will [...]
An ideal refrigerator is used to transfer heat from a freezer at -23 C to the surrounding at 27 C. Its coefficient of performance is
10
Sep
An ideal refrigerator is used to transfer heat from a freezer at -23 C to the surrounding at 27 C. Its coefficient of performance is An ideal refrigerator is used to transfer heat from a freezer at -23 C to the surrounding at 27 C. Its coefficient of performance is September 10, 2021 Category: Cengage [...]