An electron-volt is the energy gained by an electron if it is accelerated through a potential difference of one volt. What is the equivalent to an electron-volt in kilograms? (c = 3.00 × 108 m/s, e = 1.60 × 10-19 C)
What will be an ideal response?
1.78 × 10-36 kg
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If you represented each star by a grain of sand, about how much sand would it take to represent all the stars in the observable universe?
A) all the sand in a typical playground sandlot B) all the sand on Miami Beach C) all the sand on the beaches of California D) one cubic meter of sand E) all the sand on all the beaches on Earth
Distant dark mountains appear bluish because
A) they are far away. B) yellow is being scattered. C) you're looking at low-level blue sky between you and the mountain. D) of nature's wonderful preferences.
Motor oil, with a viscosity of 0.250 N • s/m2, is flowing through a tube that has a radius of 5.00 mm and is 25.0 cm long. The drop in pressure is 300 kPa. What is the volume of oil flowing through the tube per second?
A) 0.000376 m3/s B) 0.0253 m3/s C) 0.00118 m3/s D) 4.71 m3/s E) 7.54 m3/s
Spacetime is curved by
A) mass. B) the force of gravity. C) quantum fluctuations. D) the vacuum force.