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A heavy weight is suspended from a spring . A person raises the weight till the spring becomes slack . The done by him is W. The energy stored in the stretched spring was E . What will be the gain in gravitational potential energy?
20
Oct
A heavy weight is suspended from a spring . A person raises the weight till the spring becomes slack . The done by him is W. The energy stored in the stretched spring was E . What will be the gain in gravitational potential energy? A man M1 of mass 80kg runs up a staircase [...]
A bus can be stopped by applying a retarding force F when it is moving with speed v on a level road. The distance covered by it before coming to rest is s. If the load of the bus increase by 50% because of passengers, for the same speed and same retarding force, the distance covered by the bus to come to rest shall be
20
Oct
A bus can be stopped by applying a retarding force F when it is moving with speed v on a level road. The distance covered by it before coming to rest is s. If the load of the bus increase by 50% because of passengers, for the same speed and same retarding force, the distance [...]
An engine pumps water continuously through a hole. Speed with which water passes through the hole nozzle is v and k is the mass per unit length of the water jet as it leaves the nozzle. Find the rate at which kinetic energy is being imparted to the water.
20
Oct
An engine pumps water continuously through a hole. Speed with which water passes through the hole nozzle is v and k is the mass per unit length of the water jet as it leaves the nozzle. Find the rate at which kinetic energy is being imparted to the water. A man M1 of mass 80kg [...]
A pump motor is used to deliver water at a certain rate from a given pipe. To obtain ‘n’ times water from the same pipe in the same time by what amount (a) the force and (b) power of the motor should be increased ?
20
Oct
A pump motor is used to deliver water at a certain rate from a given pipe. To obtain ‘n’ times water from the same pipe in the same time by what amount (a) the force and (b) power of the motor should be increased ? A man M1 of mass 80kg runs up a staircase [...]
An engine pumps up 100kg water through a height of 10m in 5s. If efficiency of the engine is 60%. What is the power of the engine? Take g=10ms^2.
20
Oct
An engine pumps up 100kg water through a height of 10m in 5s. If efficiency of the engine is 60%. What is the power of the engine? Take g=10ms^2. An engine pumps up 100kg water through a height of 10m in 5s. If efficiency of the engine is 60%. What is the power of the [...]
To determine the half life of a radioactive element, student plots a graph of 1n dN(t)/dt versus t. Here dN(t)/dt is the rate of radioactive decay at time t. If the number of radioactive
20
Oct
To determine the half life of a radioactive element, student plots a graph of 1n dN(t)/dt versus t. Here dN(t)/dt is the rate of radioactive decay at time t. If the number of radioactive student plots a graph of 1n dN(t)/dt versus t. Here dN(t)/dt is the rate of radioactive decay at time t. If [...]
Match List 1 of the nuclear processes with List 2 containing parent nucleus and one of the end products of each process and then select the correct answer using the codes given below
20
Oct
Match List 1 of the nuclear processes with List 2 containing parent nucleus and one of the end products of each process and then select the correct answer using the codes given below Match List 1 of the nuclear processes with List 2 containing parent nucleus and one of the end products of each process [...]
Column 2 gives certain systems undergoing a process. Column 1 suggests changes in some of the parameters related to the system. Match the statements in Column 1 to the appropriate
20
Oct
Column 2 gives certain systems undergoing a process. Column 1 suggests changes in some of the parameters related to the system. Match the statements in Column 1 to the appropriate Column 2 gives certain systems undergoing a process. Column 1 suggests changes in some of the parameters related to the system. Match the statements in [...]
In a radioactive decay chain, 232 Th 90 nucleus decays to 212 Pb 82 nucleus. Let Nalpha and Nbeta be the number of alpha and beta particles, respectively , emitted in this decay process.
20
Oct
In a radioactive decay chain, 232 Th 90 nucleus decays to 212 Pb 82 nucleus. Let Nalpha and Nbeta be the number of alpha and beta particles, respectively , emitted in this decay process. 232 Th 90 nucleus decays to 212 Pb 82 nucleus. Let Nalpha and Nbeta be the number of alpha and beta [...]
The electrostatic energy of Z protons uniformly distributed throughout a spherical nucleus of radius R is given by E = 3 Z (Z-1)e^2/5 4 pie e0 R The measured masses of the neutron 1H1 , 15N7, and 15O8 are 1.008665 u, 1.007825 u,
20
Oct
The electrostatic energy of Z protons uniformly distributed throughout a spherical nucleus of radius R is given by E = 3 Z (Z-1)e^2/5 4 pie e0 R The measured masses of the neutron 1H1 , 15N7, and 15O8 are 1.008665 u, 1.007825 u, 1.007825 u 15N7 and 15O8 are 1.008665 u The electrostatic energy of [...]