Which of the following statements best describes the two principal advantages of telescopes over eyes?
A) Telescopes can collect far more light with far better angular resolution.
B) Telescopes can collect far more light with far greater magnification.
C) Telescopes have much more magnification and better angular resolution.
D) Telescopes collect more light and are unaffected by twinkling.
E) Telescopes can see farther without image distortion and can record more accurate colors.
A
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Galaxies that are far away from us have spectra that are redshifted more than galaxies that are closer to us. It is thought that the reason for this is that
A. the stars in more distant galaxies are older and cooler than those nearby. B. we are at the center of an expanding universe. C. we are at the edge of the universe and moving away from the center. D. space itself is expanding.
Uniform Circular Motion: A car moving at a steady 10 m/s on a level highway encounters a bump that has a circular cross-section with a radius of 30 m. The car maintains its speed over the bump. What is the normal force exerted by the seat of the car on a 60.0-kg passenger when the car is at the top of the bump?
A. 200 N B. 390 N C. 790 N D. 490 N E. 590 N
Which terrestrial planet has the oldest surface?
A. Venus B. Earth C. Mercury D. Mars
There is observational evidence that supports the theoretical conditions of the universe. The farthest back in the history of the universe this evidence goes is:
A) the moment of the Big Bang. B) the end of the Planck epoch. C) the beginning of GUT. D) the end of the Radiation Era. E) the Recombination Epoch.