Complex molecules in the interstellar medium are found:
A) uniformly throughout the disk of the Galaxy.
B) scattered evenly throughout the universe, a product of the Big Bang itself.
C) only around the supergiant stars like Betelguese that make their heavy atoms.
D) primarily in the dense dust clouds.
E) on the surfaces of the coolest class K and M stars only.
D
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An object moving on the x axis with a constant acceleration increases its x coordinate by 80 m in a time of 5.0 s and has a velocity of +20 m/s at the end of this time. Determine the acceleration of the object during this motion
a. ?1.6 m/s2 b. +6.4 m/s2 c. +1.6 m/s2 d. ?2.0 m/s2 e. ?6.4 m/s2
Through radar observations it was found that Venus':
A) orbit around the Sun is speeding up. B) atmosphere is changing rapidly. C) rotation on its axis is retrograde. D) orbit around the Sun is in the clockwise sense. E) orbital period is 243 days.
When you look at a single-slit diffraction pattern produced on a screen by light of a single wavelength, you see a bright central maximum and a number of maxima on either side, their intensity decreasing with distance from the central maximum. If the width of the slit is decreased,
a. the pattern shrinks in size (central maximum less wide; other maxima in closer to it). b. the pattern increases in size (central maximum wider; other maxima farther from it). c. it does not affect the size of the pattern. d. the width of the central maximum increases, but the other maxima do not change in position or width. e. the width of the central maximum decreases, but the other maxima do not change in position or width.
A series circuit consists of three identical lamps connected to a battery as shown in Figure OQ28.15. The switch S, originally open, is closed. What happens to the total power delivered to the lamps by the battery?