Which of the following is not evidence for plate tectonics on Earth?
A) Some continental boundaries fit together like pieces of a jigsaw puzzle.
B) Similar rocks and fossils are found in different continents.
C) high ocean ridges between the continents
D) the existence of volcanoes
E) earthquakes
D) the existence of volcanoes
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Consider Newton's second law states, often written as force = mass × acceleration. Based on this law, what property can you determine if you observe the acceleration of an object with a known mass?
A) the net force acting on the object B) the strength of gravity acting on the object C) the current velocity of the object D) the current location of the object
A space station of diameter 80 m is turning about its axis at a constant rate. If the acceleration of the outer rim of the station is 2.5 m/s2, what is the period of revolution of the space station?
A. 22 s B. 19 s C. 25 s D. 28 s E. 40 s
Which alcohol is used as an antifreeze?
a. 2-Hydroxypropane b. Ethylene glycol c. Ethanol d. Methanol
Gravitational waves
A. carry material into black holes. B. do not carry energy. C. are traveling distortions of space and time. D. are how pulsars pulse.