Using the ideas discussed in your text, in what sense are we "star stuff"?
A) The overall chemical composition of our bodies is about the same as that of stars.
B) Movie stars and other people are all made of the same stuff, so we all have the potential to be famous.
C) Nearly every atom from which we are made was once inside of a star.
D) We could not survive without light from our star, the Sun.
C) Nearly every atom from which we are made was once inside of a star.
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How do the light-collecting area and best possible angular resolution of 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 double the light collecting area, and its angular resolution is better by a factor of 2. B) The 10-meter telescope has 4 times the light collecting area, and its angular resolution is better by a factor of 2. C) The 10-meter telescope has 4 times the light collecting area, and its angular resolution is better by a factor of 4. D) The 10-meter telescope has 10 times the light collecting area, and its angular resolution is better by a factor of 5.
The principle of faunal succession states that
A) fossil organisms follow one another in a definite, irreversible time sequence. B) rock cycling may dislodge and relocate fossils, making their age difficult to determine. C) fossils are always older than the rock in which they are found. D) fossils are ordained.
Total Internal Reflection: Light enters a substance from air at 30.0° to the normal. It continues within the substance at 23.0° to the normal. What is the critical angle for this substance when it is surrounded by air?
A. 53° B. 51.4° C. 36.7° D. 12.6°
Two simple pendulums, A and B, are each 3.0 m long, and the period of pendulum A is T. Pendulum A is twice as heavy as pendulum B. What is the period of pendulum B?
A) 2T B) T/2 C) T/ D) T E) T