The diameter of an atomic nucleus is about a hundredth of a trillionth of a meter. In powers of 10, this is
A) 10-17 m. B) 10-11 m. C) 10-14 m. D) 10-15 m. E) 10-10 m.
C
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The motor of one car is more powerful than the motor of another car. Which of the following must be true of the more powerful motor?
A) It can do work more quickly B) It can operate for a longer time. C) It can burn fuel more efficiently. D) It can store more potential energy.
Suppose you live in the United States and you see a crescent moon in your evening sky tonight. What will a friend in South America see tonight?
A) Your friend will also see a crescent moon. B) Your friend will see a first quarter moon. C) Your friend will see a gibbous moon. D) Your friend won't see the Moon tonight, because it is up only in the morning.
(a) At what Celsius temperature is the average kinetic energy of a helium gas atom equal to 6.21 × 10-21 J? The Boltzmann constant is 1.38 × 10-23 J/K
(b) What would be the temperature for radon gas? What will be an ideal response?
A coil lies flat on a level tabletop in a region where the magnetic field vector points straight up. The magnetic field suddenly grows stronger
When viewed from above, what is the direction of the induced current in this coil as the field increases? A) counterclockwise B) clockwise C) clockwise initially, then counterclockwise before stopping D) There is no induced current in this coil.