Compared the Earth, the universe is
A) about the same age
B) just slightly older
C) much older
D) much younger
C
You might also like to view...
Centrifugal forces are
A. Real. B. Fictitious. C. Real if we are in a rotating frame.
James and John dive from an overhang into the lake below. James simply drops straight down from the edge. John takes a running start and jumps with an initial horizontal velocity of 25 m/s. When they reach the lake below,
A) the splashdown speed of James is larger than that of John. B) the splashdown speed of John is larger than that of James. C) they will both have the same splashdown speed. D) the splashdown speed of James will always be 9.8 m/s larger than that of John. E) the splashdown speed of John will always be 25 m/s larger than that of John.
A radioactive isotope has a half-life of one month. At the end of one month, the amount of the original isotope still remaining is
1) none, 2) one-quarter, 3) one-half, 4) three-fourths, and at the end of two months, the amount of original isotope remaining is 5) none. 6) one-fourth. 7) one-half. 8) three-fourths.
Which of the following could not be determined by an observation that uses only spectroscopy?
A) the chemical composition of a distant star B) the speed at which a distant galaxy is moving away from us C) the surface temperature of a distant star D) the rotation rate of a distant star E) the size of a distant galaxy