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The sun can be treated as a spherical blackbody with a radius Rsun = 6.96 x 108 m and a surface temperature of Tsun = 5,780 K, emitting light uniformly outwards in all directions. Light from the sun travels a distance of d = 1.5 x 1011 m to reach the Earth before it is absorbed. The Earth itself acts as a blackbody and re-emits this absorbed energy into the surrounding space which is at an approximate temperature of Tsp = 50.0 K. According to this model, what is the equilibrium temperature of planet Earth? The radius of the Earth is Rearth = 6.38 x 106 m.
A block of mass m is attached to a fixed wall by means of a spring whose force constant is k. The block slides on an inclined plane of angle θ. The kinetic friction coefficient between the block and the inclined surface is μ.
A submarine dives to a depth of 310 feet in the ocean. What is the gauge pressure at this depth? How many atmospheres is this
An elevator can lift a 125 N aircraft a distance of 22 meters in 12 s. What is the power output of the elevator
A uniform rectangular bookcase of height 1.63 m and width 1.03 m is to be pushed at a constant velocity across a level floor. The bookcase is pushed horizontally at its top edge, at the distance H above the floor.
A train moving with a constant velocity of 25.6 m/stravels 132 m north in 14.1 s and an undetermined distance to the west. How far west has the train traveled in this time
The angle of incidence at a solid/liquid boundary is 75.9°, and the index of refraction of the solid is n = 1.50. What is the largest index of refraction that the liquid can have
Find the minimum uncertainty in the speed of a bacterium hav-ing mass 3.0 x 10-15 kg if we know the position of the bacterium to within 1.0 micron, that is, to about its own size.
A 57-kg pole vaulter running at 1.1 m/s vaults over the bar. Her speed while she is above the bar is 1.0 m/s. Avoid air resistance, as well as any energy absorbed by the pole, and determine her altitude as she crosses the bar.
A generator at a power plant produces a voltage of 9.00 kV and current 150 A. How much power is lost as waste heat in the transmission line
A guitar string with a mass of 10.0 g is 1.00 m long and attached to the guitar at two points separated by 61.6 cm. find the frequency of the replacement string's first harmonic
Defend or refute the statements based upon your reading or any other outside sources you can quote. All statements must be backed up with citable references that are to be included in your discussion.
the drawing shows three point charges fixed in place. the charge at the coordinate origin has a value of q1 9.54c the
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