A space probe leaves the solar system to explore interstellar space. Once it is far from any stars, when must it fire its rocket engines?
A. all the time, in order to keep moving
B. only when it wants to speed up
C. only when it wants to slow down
D. only when it wants to turn
E. when it wants to speed up, slow down, or turn
E. when it wants to speed up, slow down, or turn
You might also like to view...
Two resistors of 5.0 and 9.0 ? are connected in parallel. A 4.0-? resistor is then connected in series with the parallel combination. A 6.0-V battery is then connected to the series-parallel combination
(a) What is the current through the 4.0-? resistor? (b) What is the current through the 5.0-? resistor? (c) What is the current through the 9.0-? resistor?
Imagine that we put a raisin cake into the oven, with each raisin separated from the others by 1 cm. An hour later, we take it out and the distances between raisins are 3 cm
If you lived in one of the raisins and watched the other raisins as the cake expanded, which of the following would you conclude? A) More distant raisins would be moving away from you more slowly. B) All raisins would be moving away from you at the same speed. C) More distant raisins would be moving away from you faster. D) It depends: If you lived in a raisin near the left side of the cake, you'd see other raisins moving away from you, but they'd be coming toward you if you lived in a raisin near the right side of the cake.
If we could put all the asteroids together, their total mass would be
A) much less than the mass of any terrestrial planet. B) about the mass of Mercury. C) about the mass of Earth. D) greater than the mass of Earth but less than the mass of Jupiter.
A string is attached to the ceiling. At the bottom of the string a rope of the same length as the string is attached. In the rope-string system, which of the following is the position of greatest tension? Assume the rope has more mass per unit length than the string
a. at the bottom of the rope b. at the top of the rope where it is attached to the string c. at the bottom of the string where it is attached to the rope d. at the top of the string