Which of the following is NOT a way in which we move through the universe?
a. The Milky Way orbits the center of the universe.
b. Our solar system orbits the center of our galaxy.
c. The Earth orbits the Sun.
d. The Earth is spinning on its axis.
Ans: a. The Milky Way orbits the center of the universe.
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The first telescopic photo shows what appears to be a single star. The second photo shows the same object, now revealed to be two distinct stars. What is the difference between the two photos?
A) The second photo has better (smaller) angular resolution than the first photo. B) The second photo was taken with a telescope that has greater light-collecting area. C) The second photo was taken by two telescopes rather than one. D) The second photo comes from a radio telescope, whereas the first photo comes from a visible-light photo.
We are not yet capable of detecting life on planets around other stars. But as our technology develops, our first real chance of detecting such life will probably come from ________
A) determining the orbital properties of the planets B) examining high-resolution images of the planets made by orbiting telescopes C) examining spectral lines from the atmospheres of distant planets D) sending spacecraft to study the planets up close
Which element has the atomic number 9?
A) F B) Ne C) B D) Na E) Be
What is the self-inductance of a solenoid 30.0 cm long having 100 turns of wire and a cross-sectional area of 1.00 × 10-4 m2? (?0 = 4? × 10-7 T ? m/A)
A) 4.19 µH B) 4.19 nH C) 4.19 mH D) 4.19 H E) 4.19 pH