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Electronics and inhabitants of the International Space Station generate a significant amount of thermal energy that the station must get rid of. The only way that the station can exhaust thermal energy is by radiation, which it does by using thin, 1.8-m-by-3.6-m panels that have a working temperature of about 6C. How much power is radiated from each panel? Assume that the panels are in the shade so that the absorbed radiation will be negligible. Assume that the emissivity of the panel is 1.0.
Lead shielding. When gamma rays are incident on matter, Determine the "half-thickness" for lead, that is, the thickness of lead that would absorb half the incident gamma rays
On dry land, an athlete weighs 70.8kg . The same athlete, when submerged in a swimming pool and hanging from a scale, Find the total volume V of the submerged athlete
explain Which ball will hit the ground first.
A Carnot engine operating between a warmer unknown temperature and a reservoir of boiling helium at 1.76 K has an efficiency of 75%. What is the warmer temperature
A 29 kg board 3.2 m long is supported in a horizontal position at the two ends. A 77 kg worker stands 1.4 m from one end. What forces are exerted by the board on the two support points
An ambulance siren is the source of sound emitted with a frequency of 1600 Hz. What is the frequency of the reflected sound wave heard at the ambulance
an average person uses 12000watt-hours per day, the cell is used for 6 hours a day at an incident of 1000wats/m^2, calculate the area need to supply this amount of power
A circular coil of 57 loops and diameter 30.0cm is lying flat on a tabletop, and carries a clockwise current of 1.90A . A magnetic field of 0.370T , What is the torque on the coil
A 10 kg box is on the flatbed of a truck that is accelerating along a straight horizontal road. What is the max acceleration the truck can reach without the box falling
In Rutherfords famous scattering experiments thats led to the planetary model of the atom, How close does the alpha particle get to the gold nucleus before turning around
The magnetic field perpendicular to a circular wire loop 11.2cm in diameter is changed from +0.50Tto -0.33T in 130ms, In what direction does the induced current flow?
Water flowing through a 2.00cm diameter pipe can fill a 280 L bathtub in 5.0 minutes. What is the speed of the water in pipe.
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