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A black body at 7500K consists of an opening of diameter0.0500mm looking into an oven. Find the number of photons per second escaping the hole and having wavelengths between 500mm and 501mm.
A 2600-pF air-gap capacitor is connected to a 9.0-V battery. If a piece of Pyrex glass (K=5) is placed between the plates
A diffraction grating produces a first order bright fringe that is 0.226 m away from the central bright fringe on a flat screen which is 0.675 m away. What is the wavelength of the light shining on the grating
A car starts at a point with polar coordinate (36 m, 0o) and travels around the circle to the point (36 m, 180o). What is the distance (arc length) traveled by the car
The altitude of a hang glider is increasing at a rate of 6.79 m/s. At the same time, Calculate the magnitude of the glider's velocity
A fan blade, whose diameter is 1.0 m, is turning with an angular velocity of 2.0 rad/s. What is the tangential velocity of a point on the tip of the blade
Three point charges have equal magnitudes, two being positive and one negative. These charges are fixed to the corners of an equilateral triangle. The magnitude of each of the charges is 4.0 µC, and the lengths of the sides of the triangle are 4.4..
A round pipe of varying diameter carries petroleum from a wellhead to a refinery. At the wellhead the pipe\'s diameter is 58.3 cm and the flow speed of the petroleum is 11.1 m/s. At the refinery the petroleum flows at 5.35 m/s. What is the volume flo..
The maximum angular magnification of a magnifying glass is 12.0 when a person uses it who has a near point that is 25.0 cm from his eyes. Obtain the focal length of the objective
A rocket, which is in deep space and initially at rest relative to an inertial reference frame, has a mass of 72.4 x 10^5 kg, of which 11.5 x 10^5 kg is fuel. What is the rocket's thrust
Scientists have found evidence that Mars may once have had an ocean 1.00km deep. What would be the gauge pressure at the bottom of such an ocean
a balloon is released from a tall building. The total mass of the balloon including the enclosed gas is 1.6 kg. find the magnitude of the initial acceleration of the balloon
The skis have a thrust of 190 . Sam's speed at the bottom is 35.0 . Illustrate what is the coefficient of kinetic friction of his skis on snow?
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