The ratio of electrical force, Fe, to the gravitational force Fg, between two electrons is
A) 2.1 × 1042
B) 4.2 × 1042
C) 6.3 × 1042
D) 8.4 × 1042
E) 9.8 × 1042
B
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A solid wood door, 90.0 cm wide by 2.00 m tall has a mass of 35.0 kg. It is ajar and at rest. A ball with a mass of 500 g is thrown perpendicular to the door with a speed of 20.0 m/s and hits the door 60.0 cm from the hinged side
The ball rebounds with a speed of 16.0 m/s along the same line. How much energy is lost in the process? A) 29.8 J B) 16.3 J C) 14.9 J D) 12.7 J E) 4.79 J
The special theory of relativity was developed
A) almost in its entirety by Max Planck. B) almost in its entirety by Albert Einstein. C) almost in its entirety by Erwin Schroedinger. D) in its entirety by Planck, Schroedinger, and Einstein. E) by Planck, Schroedinger, Einstein, and many other scientists.
Conservation of ___________ is observed in all interactions
a. baryon number b. lepton number c. strangeness d. charm e. beauty
A stone is dropped from the top of a well that has water in it at a depth of 30.0 m. How long does it take the stone to reach the water?