Most asteroids are very regular in shape with bright surfaces
a. True
b. False
Indicate whether the statement is true or false
False
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How large is Jupiter's magnetosphere?
A) It is about as large as the Earth's. B) It is so large it extends out to the orbit of Io. C) It is a million times the volume of the Earth's, extending beyond the orbit of Saturn. D) It extends inward to the orbit of Mars. E) It envelopes even the Sun and rest of the solar system.
A standard exam page is 8.5 inches by 11 inches. An exam that is 2.0 mm thick has a volume of
A. 1.9 × 104 mm3. B. 4.7 × 104 mm3. C. 1.2 × 105 mm3. D. 3.1 × 105 mm3. E. 3.1 × 103 mm3.
A sphere is dropped from a great height and when its speed reaches 20 m/s, its acceleration downward is 8.4 m/s2 . If the drag force is proportional to the square of the speed, what will be its acceleration downward when its speed reached 40 m/s?
a. 2.6 m/s2 b. 4.2 m/s2 c. 8.0 m/s2 d. 0 m/s2 because it has now reached terminal velocity.
Why might increasing the concentration of a set of reactants increase the rate of reaction?
A) You have increased the chances that any two reactant molecules will collide and react. B) You have increased the ratio of reactants to products. C) The concentration of reactants is unrelated to the rate of reaction. D) The rate of reaction depends only on the mass of the atoms and therefore increases as you increase the mass of the reactants. E) none of the above