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Color Problem: Compute the Planck function in wavelength for filter centroids B=4400A, V=5500A, R=6200A and I=7700A, for temperatures 3000K, 5000K, 10000K and 20000K. The temperatures correspond roughly to M,G,A,B stars. Using the Planck curves as fluxes (dlambda=1A) is fine. Compute the colors in terms of magnitude: B-V and R-I for each case. Use the Vega system.
A horizontal piston-cylinder assembly contains 0.25 kg of an ideal gas (M=28.97 kg/kmol) of constant heat capacity (Cp=1 kj/kg*k and Cv=0.72 kj/kg*k), How much heat is transferred during this process
you are told that an object has zero acceleration. two forces on the object are f1 3.2 at 80 below the x-axis and f2
Consider a string with length 36 cm. The two ends are attached to the ceiling, separated by distance 30.0 cm. A 1 kg mass is attached to the string at distance 15 cm from the left end. Then the mass hangs suspended in Earth's gravity. (a) Determin..
A small rubber wheel is used to drive a large pottery wheel, and they are mounted so that their circular edges touch. Calculate the angular acceleration of the pottery wheel
Suppose the horizontal velocity of the wind against a sail is 5.5 m/s parallel to its front surface and 3.3 m/s along its back surface. Calculate the approximate force on a square meter of sail in N
A destroyer sends a sonar pulse out to detect a submarine directly below the ship in the ocean. If the speed of sound in what is 1517 m/s and it takes 64.13 s for the return pulse to hit the hydrophone on the bottom of the ship, how deep is the su..
A box is sliding down an incline tilted at an angle of 14 degrees above horizontal. The box is sliding down the incline at a speed of 1.7 m/s. How far does the box slide down the incline before coming to rest
the 230000-lb space-shuttle orbiter touches down at about 220 mihr. at 200 mihr its drag parachute deploys. at 35 mihr
If a four-engine jet accelerates down the runway at 2 m/s2 and one of the jet engines fails, explain how much acceleration will the other three produce?
Two steel wires of the same length, one with radius r and the other with radius 2r, are connected together, end to end, and tied to a wall. How far does the point where the two wires meet move
question a single isolated conductor can store charge. we can define its capacitance as the ratio of the charge to the
A 55.5-kg ice skater is moving at 4.08 m/s when she grabs the loose end of a rope, Determine the force exerted by the horizontal rope on her arms
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