How does the light-collecting area of a telescope with a 10-meter diameter mirror compare to that of a telescope with a 5-meter diameter mirror?
A) The 10-meter telescope has 2 times the light collecting area.
B) The 10-meter telescope has 4 times the light collecting area.
C) The 10-meter telescope has 10 times the light collecting area.
A) The 10-meter telescope has 2 times the light collecting area.
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Most Greek philosophers believed in a(n) _______________ Universe
Fill in the blank(s) with correct word
Interstellar extinction and the reddening of light by the interstellar medium (ISM) are both caused by _____
a. atoms and molecules in the ISM b. only atoms in the ISM c. only molecules in the ISM d. only dust in the ISM e. dust, atoms and molecules of the ISM
A bowling ball is dropped from a height h onto the center of a trampoline, which launches the ball back up into the air. How high will the ball rise?
(a) Significantly less than h. (b) More than h. The exact amount depends on the mass of the ball and the springiness of the trampoline. (c) No more than h—probably a little less. (d) Cannot tell without knowing the characteristics of the trampoline.
A high-speed dart is shot from ground level with a speed of 150 m/s at an angle 30° above the horizontal. What is the vertical component of its velocity after 4.0 s if air resistance is neglected?
A) 130 m/s B) 150 m/s C) 38 m/s D) 36 m/s E) 75 m/s