A dictator has built a bunker for his use in emergencies. Its dimensions are shown below. When it floods to ground level during a tropical storm, the gauge pressure at point A, in Pa, is
A. 3.92 × 105.
B. 4.90 × 105.
C. 5.39 × 105.
D. 5.88 × 105.
E. 6.89 × 105.
Answer: D
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The flow patterns found on the surface of Mars and the number of craters on top of them suggest that
a. Mars is today a liquid water-rich world. b. the climate on Mars was different billions of years ago. c. volcanism is occurring on Mars. d. the polar caps are made of liquid water. e. all of the above
Which Terrestrial planet has the largest moon or moons relative to the planet circled?
a. Mercury b. Venus c. Earth d. Mars
With no air resistance, a projectile fired at 50° has the same range as if it were fired at
A) 40°. B) 45°. C) 55°. D) 60°.
What of these is the largest contributor to the average annual radiation dose? (See Table 25-5 for relevant data.)
a. Exposure during medical procedures. b. Radioactive isotopes of potassium in our bodies. c. Cosmic rays. d. Radon. e. Nuclear power.