Which of the following telescopes must be used above Earth's atmosphere?
a. an optical telescope
b. the VLBA telescope
c. an X-ray telescope
d. a radio telescope
e. None of the other choices are correct.
c
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A 2000 kg car is traveling on a banked curved icy road. The velocity of the car is 25.0 m/s and the road has a radius of curvature of 500 m. If the car is to travel on the icy road without sliding, then the angle of the banked road is
A. 25.7 degrees. B. 21.0 degrees. C. 12.7 degrees. D. 10.5 degrees. E. 7.27 degrees.
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Answer the following statement true (T) or false (F)
The "close encounter hypothesis" suggested that the planets formed after a near-collision between our Sun and another star. If this hypothesis were correct, which of the following would be true?
A) Planetary systems would be very rare. B) Planetary systems would be very common. C) Most planetary systems would have their jovian planets closer to their stars and their terrestrial planets farther from their stars. D) Most planetary systems would have the same number of planets as our own. E) All planetary systems would be at least 4 billion years old.
A star radiates most strongly at 600 nanometers. What is its surface temperature?
A. 7,250 K B. 483 K C. 6,000 K D. 72,500 K E. 4,830 K