If you push an object twice as far while applying the same force, you do
A) twice as much work.
B) four times as much work.
C) the same amount of work.
Answer: A
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Solenoid: Consider an ideal solenoid of length L, N windings, and radius b (L is much longer than b). A current I is flowing through the wire windings. If the length of the solenoid becomes twice as long (to 2L), but all other quantities remained the same, the magnetic field inside the solenoid will
A. remain the same. B. become twice as strong as initially. C. become one-half as strong as initially. D. become four times as strong as initially. E. become one-fourth as strong as initially.
The only way to make sound travel faster in air is to change the air's ____________
Fill in the blank(s) with correct word
This design combines the radiation from two different telescopes to greatly enhance resolution via computer synthesis
A) Cassegrain reflector B) Newtonian reflector C) prime focus reflector D) refractor E) interferometer
You obtain a 100. W lightbulb and a 50. W light bulb. Instead of connecting them in the normal way, you devise a circuit that places them in series across normal household voltage. Which statement is correct?
A) Both bulbs glow at the same increased brightness. B) The 100-W bulb glows brighter than the 50-W bulb. C) Both bulbs glow at the same reduced brightness. D) The 50-W bulb glows more brightly than the 100-W bulb.