If you were in a spaceship traveling close to the speed of light with respect to Earth, you would notice that
A) some of your physical dimensions were smaller than normal.
B) your mass was greater than normal.
C) your mass was less than normal.
D) your pulse rate was greater than normal.
E) none of the above effects occur.
E
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What is the significance of this image?
A) It shows an actual disk of material orbiting another star, providing strong evidence the planets really do form in such disks. B) It shows an artist's conception of what our solar system might have looked like when the planets were first forming. C) It proves that jovian planets form farther from their stars than terrestrial planets. D) The large gap visible in the image represents the frost line of a young planetary system, demonstrating that such a line really exists.
Pennies used to be made of copper, but now they are made of copper-coated zinc. If one were to do a precise calorimetry experiment to determine the specific heat of the new pennies, what would the result be?
a. It would be that of copper since copper is on the outside. b. It would be that of zinc since zinc is in the center. c. It would be the sum of the copper and zinc specific heats. d. It would be between that of copper and that of zinc, depending on coating thickness.
Our present days of the week are related to the names of the Sun, the Moon, and ______________ planets
Fill in the blank(s) with correct word
If the activity of a sample of 232Th decreases from 1000 cpm to 500 cpm in 60 min, in another 60 min its activity will be
a. 500 cpm. b. 0 cpm. c. 250 cpm. d. 125 cpm.