An alpha particle (charge = +2e) is sent at high speed toward a gold nucleus (charge +79e). What is the electrical force acting on the alpha particle when it is at a distance of 2 × 10?14 m away from the gold nucleus? (e = 1.6 × 10?19 C)
What will be an ideal response?
91 N
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A 100-W driveway light bulb is on 10 hours per day. If the power company charges 10¢ for each kilowatt-hour of electric energy used, estimate the yearly cost to operate the bulb if it is used every day for a 365-day year
A) $3.65 B) $7.30 C) $37 D) $73
Hurricanes derive their energy from
a. gravity. b. specific heat. c. the Coriolis force. d. latent heat.
An observer sees two spaceships, S1 and S2, each having the same length in its own rest frame, traveling toward each other along parallel lines from opposite directions, with equal speeds relative to the observer
As seen by this observer, the two spaceships have the same length and, when they are next to each other, the nose of one coincides with the tail of the other, and vice-versa. However, as seen by passengers on either one of the spaceships, the other spaceship is shorter than their own, so if the tail of the other spaceship is in line with the nose of their spaceship, the nose of the other spaceship cannot be lined up with the tail of theirs. How can you explain this discrepancy?
What are the disadvantages of using a water-in-glass thermometer to measure outside air temperature?