The galactic halo or corona is believed to contain mostly
a. O and B stars.
b. G, K, and M stars.
c. open clusters.
d. globular clusters.
e. dark matter.
e
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What causes the meteor showers we witness on Earth? a. Earth passes through comet dust particles
b. Earth passes through remnants of an impacted asteroid. c. Earth passes through the asteroid belt. d. Earth passes through the coma of a comet. e. Earth passes through solar wind particles.
Which of the following is a strong acid?
a. Citric acid b. Nitric acid c. Phosphoric acid d. Acetic acid
Is it possible for an object to have an acceleration of zero and a numerical value for velocity? Justify your answer with an example
Lenz's Law: In the figure, a bar magnet moves away from the solenoid. The direction of the induced current through the resistor R is
A. from a to b. B. from b to a. C. No current is induced.