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The wavelength ?max at which the spectral radiancy of a cavity radiator has its maximum value for a particular temprature T is give by the Winch displacament law, or ?maxT=a constant (=2.898X10^-3 m.K). The efective surface tempratureof the sun is 5800 K. At what wavelenght would you expect the sun radiate most strongly? In what region spectrum is this?
compute the distance from the central maximum to the first bright region on either side of the central maximum.
Determine the amount by which the star's thermal radiation increases the entropy of the universe each second. Assume that the star is a perfect blackbody, and that the average temperature of the rest of the universe is 2.73 K. Do not consider ther..
Describe two different energy alternatives to fossil fuels in detail. Discuss how they work, how they compare with fossil fuels, and their relative advantages and disadvantages.
question1. a runner is running on a circular track that is 200 m in circumference. find out the magnitude of his
A uranium-fuelled research reactor has a cubic shape with sides of length 1.0 m. estimate the power out of the reactor in units of watts
If the marble bounces straight upward to a height of 0.630 m, what is the magnitude and direction of the impulse delivered to the marble by the floor
Consider a ramp inclined at an angle of 11.00 degrees from the horizontal. how long does it take for the box to come to a stop
a rifle with a mass of 1.2kg fires a bullet with a mass of 6.0g (0.006kg). What is the momentum of the bullet after the rifle is fired
A vibration sensor, used in testing a washing machine, consists of a cube of aluminum 1.50 cm on edge mounted on one end of a strip of spring steel (like a hacksaw blade) that lies in a vertical plane. what is its frequency of vibration
Tritium (3H) decays by negative beta decay with a half-life of 12.16 years. Use an atomic weight. What is the mass in g of 1 mCi of tritium? 3.026 For 3H.To what nucleus does 3H decay.
A projectile is launched at some angle to the horizontal with some initial speed vi, and air resistance is negligible. What is its acceleration in the horizontal direction
Calculate the maximum value of resistance that can be obtained by combining resistors of 31 , 47 , and 64
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