Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions)
Two boats, A and B, move away from a buoy anchored at the middle of a river along the mutually perpendicular straight lines: the boat A along the rive, and the boat B across the river. Having moved off an equal distance from the buoy the boats returned. Find the ratio of times of motion of boats τA/τB if the velocity of each boat with respect to water is η=1.2 times greater than the stream velocity.
24
Aug
Two boats, A and B, move away from a buoy anchored at the middle of a river along the mutually perpendicular straight lines: the boat A along the rive, and the boat B across the river. Having moved off an equal distance from the buoy the boats returned. Find the ratio of times of motion [...]
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A and B ,
move away from a buoy anchored at the middle of a river along the mutually perpendicular straight lines: the boat A along the rive ,
move with constant velocities v 1 and v 2 . At the initial moment their position vectors are r 1 and r 2 respectively. The condition for particles A and B for their collision is: ,
Two boats ,
Two particles A and B ,
solid copper sphere of dimater 10mm is cooled to temperature of 150K and is then placed in an enclousure at 290K Assuming that all interchange of heat is by radiation, calculate the initial rate of rise of temperature of the sphere The sphere may be treated as a black body rho_(copper) =8.93xx 10^(3)kg//m^(3) s = 3.7xx10^(2) Jkg^(-2) K^(-1) , sigma = 5.7 xx 10^(8) Wm^(-2) K^(-4) .
24
Aug
solid copper sphere of dimater 10mm is cooled to temperature of 150K and is then placed in an enclousure at 290K Assuming that all interchange of heat is by radiation, calculate the initial rate of rise of temperature of the sphere The sphere may be treated as a black body rho_(copper) =8.93xx 10^(3)kg//m^(3) s = [...]
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calculate the initial rate of rise of temperature of the sphere The sphere may be treated as a black body rho_(copper) =8.93xx 10^(3)kg//m^(3) s = 3.7xx10^(2) Jkg^(-2) K^(-1) ,
sigma = 5.7 xx 10^(8) Wm^(-2) K^(-4) . ,
solid copper sphere of dimater 10mm is cooled to temperature of 150K and is then placed in an enclousure at 290K Assuming that all interchange of heat is by radiation ,
A double-pane window consists of two glass sheets each of area 1m^(2) and thickness 0.01m separated by a 0.05 m thick stagnant air space. In the steady state, the room glass interface and the glass outdoor interface are at constant temperature of 27^(@)C and 0^(@)C, respectively. (a) Calculate the rate of heat flow through the window pane. (b) Find the temperatures of other interfaces. [Take: thermal conductivities as K_(glass)=0.8Wm^(-1)K^(-1) and K_(air)=0.08Wm^(-1)K^(-1)]
24
Aug
A double-pane window consists of two glass sheets each of area 1m^(2) and thickness 0.01m separated by a 0.05 m thick stagnant air space. In the steady state, the room glass interface and the glass outdoor interface are at constant temperature of 27^(@)C and 0^(@)C, respectively. (a) Calculate the rate of heat flow through the [...]
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A double-pane window consists of two glass sheets each of area 1m^(2) and thickness 0.01m separated by a 0.05 m thick stagnant air space. In the steady state ,
Cubical expansivity of benzene =1.2xx10^(-3)K^(-1) Cubical expansivity of wood =1.5xx10^(-4)K^(-1) ,
Density of wood at 0^(@)C=8.8xx10^(2)kgm^(-3) ,
find the change in temperature at which wood will just sink in benzene. Density of benzene at 0^(@)C=9xx10^(2)kgm^(-3) ,
the room glass interface and the glass outdoor interface are at constant temperature of 27^(@)C and 0^(@)C ,
Using the following data ,
Two particles A and B, move with constant velocities v 1 and v 2. At the initial moment their position vectors are r 1 and r 2 respectively. The condition for particles A and B for their collision is:
24
Aug
Two particles A and B, move with constant velocities v 1 and v 2. At the initial moment their position vectors are r 1 and r 2 respectively. The condition for particles A and B for their collision is: move with constant velocities v 1 and v 2 [...]
Two bodies were thrown simultaneously from the same point, one, straight up, and the other, at the angle of theta = 60 degree to the horizontal. The initial velocity of each body is equal to vo = 25 m/s^1.l.
24
Aug
Two bodies were thrown simultaneously from the same point, one, straight up, and the other, at the angle of theta = 60 degree to the horizontal. The initial velocity of each body is equal to vo = 25 m/s^1.l. and the other at the angle of theta = 60 degree to the horizontal. The initial [...]
Air is initially at 260^(@)C and 700pa and occupied 0.028m^(3). The air is expanded at constant pressure to 0.084 m^(3). A polytropic process with n=1.5 is then carried out followed by a constant temperature process which complete the cycle. (a) sketch cycle in P-V. (b) find heat received and heat rejected in the cycle. (c ) efficiency of cycle.
24
Aug
Air is initially at 260^(@)C and 700pa and occupied 0.028m^(3). The air is expanded at constant pressure to 0.084 m^(3). A polytropic process with n=1.5 is then carried out followed by a constant temperature process which complete the cycle. (a) sketch cycle in P-V. (b) find heat received and heat rejected in the cycle. (c [...]
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Cubical expansivity of benzene =1.2xx10^(-3)K^(-1) Cubical expansivity of wood =1.5xx10^(-4)K^(-1) ,
Density of wood at 0^(@)C=8.8xx10^(2)kgm^(-3) ,
find the change in temperature at which wood will just sink in benzene. Density of benzene at 0^(@)C=9xx10^(2)kgm^(-3) ,
Using the following data ,
A steel rod with a cross-sectional area of 150 mm^(2) is stretched between two fixed points. The tensile load at 20^(@)C is 5000N. (a) What will be the stress at -20^(@)C ? (b) At what temperature will the stress be zero ? (Assume alpha=11.7mu m//m^(@)C and Y=200GN//m^(2))
24
Aug
A steel rod with a cross-sectional area of 150 mm^(2) is stretched between two fixed points. The tensile load at 20^(@)C is 5000N. (a) What will be the stress at -20^(@)C ? (b) At what temperature will the stress be zero ? (Assume alpha=11.7mu m//m^(@)C and Y=200GN//m^(2)) Cubical expansivity of benzene =1.2xx10^(-3)K^(-1) Cubical expansivity of [...]
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Cubical expansivity of benzene =1.2xx10^(-3)K^(-1) Cubical expansivity of wood =1.5xx10^(-4)K^(-1) ,
Density of wood at 0^(@)C=8.8xx10^(2)kgm^(-3) ,
find the change in temperature at which wood will just sink in benzene. Density of benzene at 0^(@)C=9xx10^(2)kgm^(-3) ,
Using the following data ,
The resultant of two forces of magnitude 5 N and 3 N trisects the angle between them. Calculate the angle between them.
24
Aug
The resultant of two forces of magnitude 5 N and 3 N trisects the angle between them. Calculate the angle between them. The resultant of two forces of magnitude 5 N and 3 N trisects the angle between them. Calculate the angle between them. August 24, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma [...]
Using the following data, find the change in temperature at which wood will just sink in benzene. Density of benzene at 0^(@)C=9xx10^(2)kgm^(-3), Density of wood at 0^(@)C=8.8xx10^(2)kgm^(-3), Cubical expansivity of benzene =1.2xx10^(-3)K^(-1) Cubical expansivity of wood =1.5xx10^(-4)K^(-1)
24
Aug
Using the following data, find the change in temperature at which wood will just sink in benzene. Density of benzene at 0^(@)C=9xx10^(2)kgm^(-3), Density of wood at 0^(@)C=8.8xx10^(2)kgm^(-3), Cubical expansivity of benzene =1.2xx10^(-3)K^(-1) Cubical expansivity of wood =1.5xx10^(-4)K^(-1) Cubical expansivity of benzene =1.2xx10^(-3)K^(-1) Cubical expansivity of wood =1.5xx10^(-4)K^(-1) Density of wood at 0^(@)C=8.8xx10^(2)kgm^(-3) find the change [...]
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Cubical expansivity of benzene =1.2xx10^(-3)K^(-1) Cubical expansivity of wood =1.5xx10^(-4)K^(-1) ,
Density of wood at 0^(@)C=8.8xx10^(2)kgm^(-3) ,
find the change in temperature at which wood will just sink in benzene. Density of benzene at 0^(@)C=9xx10^(2)kgm^(-3) ,
Using the following data ,
Find the speed of two objects if, when they move uniformly towards each other they get 4 m closer in every sec and when they move uniformly in the same direction with their original speeds, they get 4m closer every 10s.
24
Aug
Find the speed of two objects if, when they move uniformly towards each other they get 4 m closer in every sec and when they move uniformly in the same direction with their original speeds, they get 4m closer every 10s. Find the speed of two objects if they get 4m closer every 10s. when [...]