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The moon barely covers the sun at a solar eclipse. Given that the moon is 4 x 105 kilometer from Earth and that the Sun is 1.5 x 108 kilometer from Earth, find how much bigger the Sun diameter is than the moon. If the moon's radius is 1800 kilometer, determine how big is the Sun?
An AC generator has 80 rectangular loops on its armature. Each loop is 11 cm long and 10 cm wide. calculate the maximum output voltage of this generator
A proton is shot at 5.0x10^7 m/s toward a gold target. Thenucleus of a gold atom, with a mass 197 times that of the proton,repels the proton and deflects it straight back with 90% of itsinitial speed. What is the recoil speed of the goldnucleus
At a certain distance from the center of the Earth, a 4.0- object has a weight of 3.0 . If the object is now moved twice as far from the Earth, by what factor does its weight change?
a child tosses a ball straight up. she says the ball is moving away from her hand because the ball feels an upward
An airplane, diving at an angle of 48º with the vertical, release a projective at an altitude of 830m. What was the vertical component of its velocity
Upton Chuck is riding the Giant Drop at Great America. If Upton free falls for 2.6 seconds, what will be his final velocity and how far will he fall
What is the shortest height a plane mirror must be so that a person who is 1.6 meters tall is able to see his or her whole body? plan a ray diagram to support your answer.
unpolarized light with intensity io passes through two polarizers the transmission of the one is vertical and that of the other is 60 degrees to the vertical
A He-Ne laser produces light of wavelength 633 nm with intensity 1.02 103 W/m2, over a beam of cross-sectional area 0.940 mm2. How many photons per second are emitted by the laser?
An astronomer observes electromagnetic waves emitted by oxygen atoms in a distant galaxy that have a frequency of 5.710 × 1014 Hz. Determine the relative velocity of the galaxy with respect to the astronomer on the earth
A soccer player kicks a rock horizontally off a 34.0-m-high cliff into a pool of water. what was the initial speed given to the rock
When you take a bath, how many kg of hot water (49 oC) must you mix with cold water (13 C) so that the temperature of the bath is 36 oC? The total mass of the water (hot and cold) is 191-kg.
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