Which of the following is a "renewable" resource?
A) hydroelectric
B) uranium
C) Both of the above.
D) natural gas
E) None of these are renewable resources.
C
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Which of the following could be a hypothesis for the function of the thick waxy coating of a pine needle
A. If the thick, waxy coating is destroyed, the pine needle will turn B. The thick, waxy coating prevents water loss C. What happens to the needle if the thick, waxy coating is brown. destroyed? D. The tree would feel cold without the thick, waxy coating
In glass, which of the following colors of light travels fastest?
a. red b. blue c. yellow d. All three of the above travel at the same speed.
Measurements of the magnetic field of Venus reveal that the
a. planet has a large iron core. b. interior of the planet is molten. c. planet has no detectable magnetic field. d. planet rotates backwards. e. magnetic field is responsible for large auroral displays (northern lights) on Venus.
A 3.6 kg box is held at rest by two ropes that form 30° angles with the vertical. An external force F acts vertically downward on the box. The force exerted by each of the two ropes is denoted by T
A force diagram, showing the four forces that act on the box in equilibrium, is shown in Figure 5.6. The force F is adjusted so that the magnitude of force T is equal to the weight w. The magnitude of force F, for which this occurs, is closest to: A) 26 N B) 27 N C) 28 N D) 29 N E) 30 N