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A cryogenic storage container holds liquid helium, which boils at 4.2 K. Suppose a student painted the outer shell of the container black, turning it into a pseudo-blackbody, and that the shell has an effective area of 0.40 m2 and is at 3.3 102 K. (a) Determine the rate of heat loss due to radiation. (The Stefan-Boltzmann constant is ? = 5.67 10-8 W/(m2 K4).) (b) What is the rate at which the volume of the liquid helium in the container decreases as a result of boiling off? The latent heat of vaporization of liquid helium is 20.9 kJ/kg. The density of liquid helium is 0.125 kg/L.
A 250g steel ball and a 500g steel ball each hang from 3.0-m-long strings. At rest, the balls hang side by side, barely touching. To What angle does each ball rebound
With cooperation acrobats in circular rotating cages that are attached to two beams in a shape of a cross (one cage attached to each end of the beam) can rotate the beams. Where does this energy come from
A snowman is made of three spheres of radii R,2R,3R with the largest sphere on the bottom and the smallest sphere on top. Find the center of mass of the snowman
On a cool morning, when the temperature is 14.0 ^circC, you measure pressure in your car tires to be 20.0 psi. After driving 40.0 mi on the freeway, the temperature of your tires is 50.0 ^circC.
An RLC circuit is used to tune a radio to an FM radio station broadcasting at 35.9 MHz. What inductance should be present in the circuit
Unpolarized light passes through two Polaroid sheets. The transmission axis of the analyzer makes an angle of 21.9° with the axis of the polarizer. What fraction of the original light is absorbed by the analyzer
Identify the magnitudes of the tension force t in the deltoid muscle and the force s of the shoulder on the humerus (upper-arm bone) to hold the arm in the position shown.
A heat engine operates between a cold reservoir at 10 C and a hot reservoir at 200 C. how much heat must be exhausted as waste
A 60.0kg athlete runs up a flight of 25 steps, each 20.Ocm high, in 10.0s. Calculate the work done by gravity on the athlete
In particular, if a 2.000Å (.2nm) photon interacts with the bound electron in an hydrogen atom (binding energy 13.6 eV) with a Compton collision. What is the energy of the scattered photon
An olympic skier moving at 20.0 m/s down a 30.0 Degrees slope encounters a region of wet snow and slides 145 m before coming to a halt
A ball falls straight down onto a wedge that is sitting on frictionless ice. The ball has a mass of 3.27 kg, and the wedge has a mass of 5.31 kg. what is the velocity of the wedge after the collision
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