Question Answers
Sahay Sir > Question Answers
A horizontal constant force F pulls a block of mass m placed on a horizontal surface If the coefficient of kinetic friction between the block and ground is mu. find the power delivered by the external agent a
31
Aug
A horizontal constant force F pulls a block of mass m placed on a horizontal surface If the coefficient of kinetic friction between the block and ground is mu. find the power delivered by the external agent a An elevator of mass M with a person of mass m is moving upward with uniform velocity [...]
The two ends of a rod of length L and a uniform cross-sectional area A are kept at two temperatures T1 and T2(T1 T2). The rate of heat transfer, dt/dQ, through the rod in a steady state is given by :
31
Aug
The two ends of a rod of length L and a uniform cross-sectional area A are kept at two temperatures T1 and T2(T1 T2). The rate of heat transfer, dt/dQ, through the rod in a steady state is given by : dt/dQ The two ends of a rod of length L and a uniform [...]
A cylindrical metallic rod in thermal contact with two reservoirs of heat at its two ends conducts an amount of heat Q in time t. The metallic rod is melted and the material is formed into a rod of half the radius of the original rod. What is the amount of heat conducted by the new rod, when placed in thermal contact with the two reservoirs in time t ?
31
Aug
A cylindrical metallic rod in thermal contact with two reservoirs of heat at its two ends conducts an amount of heat Q in time t. The metallic rod is melted and the material is formed into a rod of half the radius of the original rod. What is the amount of heat conducted by the [...]
A body is thrown with a velocity v0 at an angle theta0 with horizontal. Find the (a) instantaneous power delivered by gravity after a time t measured from the instant of projection and (b) average power delivered by gravity during the time t.
31
Aug
A body is thrown with a velocity v0 at an angle theta0 with horizontal. Find the (a) instantaneous power delivered by gravity after a time t measured from the instant of projection and (b) average power delivered by gravity during the time t. An elevator of mass M with a person of mass m is [...]
When 1kg of ice at 0∘C melts to water at 0∘C, the resulting change in its entropy, taking latent heat of ice to be 80cal/ C is.
31
Aug
When 1kg of ice at 0∘C melts to water at 0∘C, the resulting change in its entropy, taking latent heat of ice to be 80cal/ C is. taking latent heat of ice to be 80cal/ C is. the resulting change in its entropy When 1kg of ice at 0∘C melts to water at 0∘C August [...]
The unit of thermal conductivity is
31
Aug
The unit of thermal conductivity is The unit of thermal conductivity is August 31, 2020 Category: Chapter 17 - Thermal Properties of Matter , NEET Last 32 Years Solved 1988 - 2019 Physics and Chemistry Video Solutions , Physics ,
The two ends of a metal rod are maintained at temperature 100 C and 110C. The rate of heat flow in the rod is found to be 4.0 J/s. If the ends are maintained at temperatures 200C and 210C, the rate of heat flow will be
31
Aug
The two ends of a metal rod are maintained at temperature 100 C and 110C. The rate of heat flow in the rod is found to be 4.0 J/s. If the ends are maintained at temperatures 200C and 210C, the rate of heat flow will be the rate of heat flow will be The two [...]
Liquid oxygen at 50 K is heated to 300 K at constant pressure of 1 atm. The rate of heating is constant. Which of the following graphs represents the variation of temperature with time?
31
Aug
Liquid oxygen at 50 K is heated to 300 K at constant pressure of 1 atm. The rate of heating is constant. Which of the following graphs represents the variation of temperature with time? Liquid oxygen at 50 K is heated to 300 K at constant pressure of 1 atm. The rate of heating is [...]
An elevator of mass M with a person of mass m is moving upward with uniform velocity v. What is the power delivered by the elevator?
31
Aug
An elevator of mass M with a person of mass m is moving upward with uniform velocity v. What is the power delivered by the elevator? An elevator of mass M with a person of mass m is moving upward with uniform velocity v. What is the power delivered by the elevator? August 31, 2020 [...]
Steam at 100°C is passed into 20 g of water at 10°C. When water acquires a temperature of 80°C, the mass of water present will be [Take specific heat of water = 1 cal g^-1°C^-1 and latent heat of steam = 540 cal g^-1]
31
Aug
Steam at 100°C is passed into 20 g of water at 10°C. When water acquires a temperature of 80°C, the mass of water present will be [Take specific heat of water = 1 cal g^-1°C^-1 and latent heat of steam = 540 cal g^-1] Steam at 100°C is passed into 20 g of water at [...]