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Liquid helium has a temperature of only 4.24 K and is in equilibrium with its vapor at atmospheric pressure. Calculate the rms speed of a helium atom in the vapor at this temperature.
A 20·kg fish swimming 1·m/s swallows a smaller 10·kg fish swimming toward it at a speed that brings both fish to a halt immediately after lunch. what is the velocity of the smaller fish just before lunch
A 798 kg satellite is in a circular orbit about the Earth at a height above the Earth equal to the Earth's mean radius. Find the period of its revolution
The force F3, 6.17 N, acts on the block at an angle of 152.02 degrees. what is the work done by the force F3
An infinitely long charged wire produces an electric field of magnitude 1.17 103 N/C at a distance of 46.4 cm perpendicular to the wire. The direction of the electric field is toward the wire. (a) What is the charge distribution? (b) How many electro..
Three blocks, each of mass 14.0 kg are on a frictionless table. What is the net horizontal force on block A
An electron confined in a harmonic potential well emits a 1280nm photon as it undergoes a 5 ? 4 quantum jump. What is the spring constant of the potential well
A juvenile elephant has a mass of 300kg. He wishes to fly using his very large ears. find the total surface area of his two ears
A magnetic field is perpendicular to the plane of a singleturn circular coil. The magnitude of the field is changing,so that an emf of .80V, What emf and current are induced in the square coil
Presume your local government wants to raise your taxes in order to support the construction of wind and solar power plants that can give your town with low-polluting energy and help decrease your town's dependence on fossil fuels for energy. Would y..
Four protons, each with charge +e, are fixed at the corners of a square of side length a, Determine magnitude and direction of the electric field E
A skater rotates at 4.5 revolutions per second (rev/s) with legs together and arms raised over his head. By extending his arms, What is the new rotation rate
A ceiling fan with 80-diameter blades is turning at 68. Suppose the fan coasts to a stop 27 after being turned off. What is the speed of the tip of the blade 10 after the fan is turned off.
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