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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 0.36 meters squared and is at 3.1e+02 K
(a) Determine the rate of heat loss due to radiation. (The Stefan-Boltzmann constant is 5.67e-08)
(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.
Provide your answer in m/s in scientific notation to three significant digits (i.e. 1.15*10^2)
A person's right eye can see objects clearly only if they are between 27cm and 86cm away. What will be the near point with the lens in place
On December 3 at 11 pm you look toward the eastern horizon and see the bright star Procyon rising. At approximately what time would Procyon rise one week later, on December 9.
Using a theodolite, with a laser rangefinder, a researcher at point A locates a pair of rare birds nesting at point B, For observation from point C, determine the direction angles and distance to the nest at B
what is the combined mass of the dog and basket.
Please state Ohm's Law using words, and in several ways if you can. Reference to graphs may make this easier for you
While taking photographs in Death Valley on a day when the temperature is 58.0°C, What current does he register there if the temperature is -88.0°C
A 0.75 kg ball attached to the end of a horizontal cord, is rotated in a circle of radius 1.9 m on a frictionless horizontal surface, What is the max speed the ball can have
A crane at a construction site lifts a concrete block with a mass of 440 kg from the ground to the top of a building with a height of 15.0 m
A grade school student plans to build a 34-power telescope as a science fair project. What focal length is needed for her objective lens
A mass on a spring vibrates in simple harmonic motion at a frequency of 0.75 Hz and amplitude of 4.0 cm. what is the speed of the mass when t = 1.0 s
A proton travels with a speed of 3.00 ? 106 m/s at an angle of 55.0° with the direction of a magnetic field of 0.520 T in the +y direction. determine the magnitude of the magnetic force on the proton
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