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A modern-day zeppelin holds 7,720 m3 of helium. Calculate its maximum payload at sea level. (Suppose the helium and air to be at 0°C and 1 atm.)
A steel ball of mass M is released from rest at point P. It follows a smooth curved rail to point Q and finally reaches point R with K.E. of 7J. The speed of the ball at point Q is 2MS-1 and the height between point P and the ground is 3m. Then find ..
A 3.00 kilogram block on a horizontal floor is attached to a horizontal spring that is initially compressed 0.0400 meter. A Find what is the speed of the block when it has moved a distance of 0.0200 m from its initial position
Sam, whose mass is 74kg , straps on his skis and starts down a 44m -high, 20? frictionless slope. Use work and energy to find Sam's speed at the bottom
In a particular beta-minus decay of a free neutron (that is, one not part of an atomic nucleus), the emitted electron has exactly the same kinetic energy as the emitted electron antineutrino. What is the value, in MeV, of that kinetic energy? Assume ..
Pitman Co's tax rate is 40% for 2013 an all future years. At the end of 2013, the following deferred tax account and balance that should be reported on Pitman's balance sheet is?
Two children hang by their hands from the same tree branch. The branch is straight, and grows out from the tree trunk at an angle of 25.7° above the horizontal, What is the magnitude of the net torque exerted on the branch by the children
Air undergoes a polytropic expansion process in a piston-cylinder assembly from 75 psia and 300 F to 15 psia. Employing the ideal gas model with constant specific heat ratio k, determine the temperature at the end of the process and the amounts of wo..
You have a 1.0m long copper wire. You want to make an N-turn current loop that generates a 1.2mT magnetic field at the center when the current is 2.5A. What will be the diameter of your coil
A 390 g glass coffee cup is at a room temperature of 20?C. It is then plunged into hot dishwater at 80 ?C. how much heat does the cup absorb
A block with mass m = 4 kg is sitting on the ground and not moving. The acceleration due to gravity is g = 9.81 m/s2. Please answer the following questions.
If the LED emits light from a circle with diameter 10mm and is to couple to the fiber which has a50 micro meter diameter core .assume it radiates with afull cone angle 30 degree.
Two small plastic balls hang from threads (1m long) of negligible mass. Each ball has a mass of 0.09 g and equal charges. The balls are repelled with each other .they are 18cm apart and the threads attached to the balls make an angle of 25 degree wit..
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