The resolving power of a telescope is
a. a measure of the minimum angular separation that can be seen with the telescope.
b. a measure of the maximum angular separation that can be seen with the telescope.
c. a measure of the amount of light that the telescope can gather in one second.
d. the separation between the objective and the image.
e. a measure of how blurry object appear in the telescope.
a
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The flight of a blimp best illustrates
A) Archimedes' principle. B) Pascal's principle. C) Bernoulli's principle. D) Boyle's law.
When we look at an object that is 1,000 light-years away we see it
A) as it was 1,000 years ago. B) as it was 1,000 light-years ago. C) as it is right now, but it appears 1,000 times dimmer. D) looking just the same as our ancestors would have seen it 1,000 years ago.
A flat piece of iron is tightly tied against top of a wooden block. The iron-wood block floats in a bucket of water. If the iron-wood block flips over so the iron is on the bottom, the water level at the side of the bucket
A) rises. B) falls. C) remains the same.
A thin copper rod that is 1.0 m long and has a mass of 0.050 kg is in a magnetic field of 0.10 T. What minimum current in the rod is needed in order for the magnetic force to cancel the weight of the rod?
A) 1.2 A B) 7.6 A C) 2.5 A D) 4.9 A E) 9.8 A