Find minimum number of photons per second owl eye can detect
What is the minimum number of photons per second that an owl eye can detect if its pupil has a diameter of 8.5 mm and the light has a wavelength of 510 nm?
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Two stationary positive point charges, charge 1 of magnitude 3.80 nC and charge 2 of magnitude 1.55 nC, are separated by a distance of 35.0 cm. An electron is released from rest at the point midway between the two charges, and it moves along the l
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A hiker shouts toward a vertical cliff 740 m away. The echo is heard 4.00 s later. What is the speed of sound of the hiker's voice in air?
A(n) 0.55 kg softball is pitched at a speed of 18 m/s. The batter hits it back directly at the pitcher at a speed of 25 m/s. The bat acts on the ball for 0.018 s. What is the magnitude of the average force exerted by the bat on the ball during con
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A wire streches from the top of a vertical pole to a point on level ground 16 feet from the base of the pole. if the wire makes an angle of 62 degrees withe the ground, find the height of the pole and the length of the wire.
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