When a chocolate bar is cut in half, its density is
A) halved.
B) unchanged.
C) doubled.
Answer: B
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A uniform electric field, with a magnitude of 600 N/C, is directed parallel to the positive x axis. If the potential at x = 4.0 m is 1000 V, what is the potential at x = 2.0 m?
a. -800 V c. 2800 V b. 2200 V d. 1600 V
Gravitational lensing of distant, faint irregular galaxies may be the key to
A) understanding galactic rotation curves. B) understanding active galactic nuclei. C) quasar energy production. D) mapping dark matter. E) determining galactic redshifts.
When an object is hanging on the end of a vertical spring and oscillating up and down, which of these is a period?
a. The same as a cycle. b. Its journey from the highest point it can reach to the lowest point it can reach. c. The time the object takes to travel from any point it can reach back to the same point. d. The time the object takes to travel from its highest point to its lowest point. e. The time the object takes to travel from the highest point to the lowest and back to the highest.
In Europe, what weather phenomenon coincided with the Maunder Minimum?
What will be an ideal response?