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Block A of mass m is attached to a cord which is wrapped around a uniform disk of mass M. The block is released from rest and falls through a distance h before the cord becomes taut. Derive expressions for the velocity of the block and the angular velocity of the disk immediately after the impact. Assume that the impact is
(a) Perfectly plastic,
(b) Perfectlyelastic.
a step down transformer produces a voltage of 6 v across the secondary coil when the voltage across the primary coil is
What is the maximum rate of rotation. A moving electron passes near the nucleus of a gold atom, which contains 79 protons and 118 neutrons. At a particular moment electron is a distance of 7.5 x10 ^9 m from the gold nucleus.
To drive to Chicago, a distance of about 150 km in 2 hours, you must average a speed of 75 km/hr. How fast must you drive to keep an average speed of 75 km/hr
A hypothetical positronium atom consists of an electron orbiting a positron, Using the Bohr Theory, calculate the radius (in nm) of the first orbital of this "atom"
two objects attract each other with a gravitational force of magnitude 9.210-9 n when separated by 19.8cm. if the total
A sealed tube (0.5 L) in volume confines two moles of an ideal gas at a pressure of 2 atm. What is the average kinetic energy of a gas molecule
A softball of mass 0.200kg that is moving with a speed of 7.0m/s collides head-on and elastically with another ball initially at rest, Calculate the mass of the target ball
A lead shot of mass 600 gram is heated to 100oC and located in an aluminum can of mass 200 gram, which contains 500 gram of water initially, are 17.5 Celsius. Calculate what is the specific heat of lead
The Isotope tritium has a half-life of 12.3 years. Assume we have 10 kg of the substance. What will be the disintegration constant (1/s)
a charge of 7.65mc is placed at each corner of a square 0.230m on a side. determine the magnitude of the force on each
During a fun run a girl runs for 12 s moving 2.7 m/s. She then accelerates at 0.5 m/s^2 over the next 25 m. What distance did she cover during the entire period
A rainbow viewed from an airplane may form a complete circle. Where will the shadow of the airplane appear? Explain
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