Bowen's reaction series predicts the ________ of the different mineral grains that grow from crystallizing magmas.
a. size and color
b. texture and size
c. order of crystallization
d. color and shape
Answer: c. order of crystallization
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Suppose unlike Chelyabinsk, the next major asteroid impact we experience is more devastating. Why might this be?
A) The asteroid is larger in size. B) It has a more vertical trajectory, and is therefore less likely to break up in the atmosphere due to friction. C) It hit water, which will cause a world-wide tsunami. D) Both A and B
The Jovian planets have low density because:
A) they formed in the outer solar nebula where water vapor could freeze to form ice particles. B) interactions between their magnetic fields and the solar wind generate powerful electric currents. C) the continuous blast of micrometeorites evaporates surface ice, leaving behind embedded minerals. D) the heat flowing out of them emits about twice as much less energy as they absorb from the Sun.
A car moving at 50 km/h skids 20 m with locked brakes. How far will it skid if its initial speed is 150 km/h?
A) 20 m B) 60 m C) 90 m D) 180 m
A point on the rim of a 0.15-m-radius rotating disk has a centripetal acceleration of 5.0 m/s2 . What is the angular speed of a point 0.075 m from the center of the disk?
a. 0.89 rad/s b. 1.6 rad/s c. 3.2 rad/s d. 5.8 rad/s