The break-up of Pangaea resulted in
A) a worldwide rise in sea level.
B) a worldwide drop in sea level.
C) no significant change in sea level.
D) alternating sea level changes.
Answer: A
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a. True b. False Indicate whether the statement is true or false
A 92-kg man climbs into a car with worn out shock absorbers, and this causes the car to drop down 4.5 cm. As he drives along he hits a bump, which starts the car oscillating at an angular frequency of 4.52 rad/s. What is the mass of the car?
A) 890 kg B) 760 kg C) 920 kg D) 990 kg E) 1900 kg
Springs: The graphs shown show the magnitude F of the force exerted by a spring as a function of the distance x the spring has been stretched. For which one of the graphs does the spring obey Hooke's law?
A. Graph a B. Graph b C. Graph c D. Graph d E. Graph e
The characteristic peaks in an x ray spectrum of an atom occur because
a. of photon absorption b. of the photoelectric effect c. electrons in the atom make transitions to lower energy levels d. of the uncertainty principle e. of rapid deceleration of the bombarding electrons