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(a) An electromagnetic wave of intensity 210 W/m2 is incident normally on a rectangular black card with sides of 25 cm and 39 cm that absorbs all the radiation. Discover the force exerted on the card by the radiation.(b) Discover the force exerted by the same wave if the card reflects all the radiation incident on it.
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
water is flowing through a channel that is 12 m wide with a speed of .75ms. the water then flows into four identical
The outstretched hands and arms of a figure skater preparing for a spin can be considered a slender rod pivoting about an axis through its center. (See the figure below (Figure 1) .) When the skater's hands and arms are brought in and wrapped arou..
At table tennis ball has a positive charge of 4.50 × 10-8 coulombs. It experiences a force of 2.72 × 10-3 newtons due to an electric field. What is the strength of the electric field?
A ballplayer standing at homeplate hits a baseball that is caught by another player at the same height above the ground from which it was hit. How high will the ball rise
You stand in the earth's magnetic field, directly facing its horizontal component (in other words, facing magnetic south). The field has a magnitude of 0.550 gauss and is directed 55.2° below the horizontal. Calculate the inward magnetic flux throu..
A bird is initially flying horizontally east at 21.1 m/s, but one second later it has changed direction therefore that it is flying horizontally and 7 north of east, at the same speed. Find the magnitude and direction of its acceleration vector
What is the speed of the large cart after the impact.
q1. a ball in flight is recorded and analyzed using digital video analysis software. the analysis produced the result
A certain transformer has 500 turns on the primary. If 10 volts are applied to the primary, what was the current in the primary
A person stands on a bathroom scale in a motionless elevator. When the elevator begins to move, the scale briefly reads only 0.82 of the person's regular weight, Find the direction of the acceleration
A 1000 kilogram automobile rounds a curve of a radius of 70 meter at 23m/s, and the banking angle is 38o for no friction to be between the road and tires. Then what banking angle must the curve have
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