Where do mountains like the Himalayas come from?
A. The Earth is made of molten rock and metals, and regions with opposite electrical charges attract each other and form peaks.
B. The Earth formed by an irregular processes and that is just the way that it was shaped when the molten rock cooled into place.
C. The Moon's gravity pulls some layers up into mountain ranges.
D. In some locations, plates of rock on the planet's surface press together and the plates rise together.
E. Rain of debris from meteorites and comets falls in some places more than others, and builds up into mountains.
Ans: D. In some locations, plates of rock on the planet's surface press together and the plates rise together.
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Consider the first major feature (orderly motions). Which of the following correctly describe patterns of motion in our solar system?
A. Major moons generally have polar orbits, meaning orbits that take them over the north and south poles of the planet they orbit. B. All the planets orbit the Sun in nearly the same plane. C. The outer planets are so large that they nearly collide with each other on each orbit. D. Inner planets orbit the Sun in the opposite direction from the outer planets. E. The Sun and most of the planets rotate in the same direction that the planets orbit. F. Planets have nearly circular orbits.
You have a machine which can accelerate pucks on frictionless ice. Starting from rest, the puck travels a distance x in time t when force F is applied. If force 3F is applied, the distance the puck travels in time t is
A. x. B. (3/2)x. C. 3x. D. (9/2)x. E. 9x.
Which of the following is not associated with a cold front?
A) thunderstorms B) drop in air pressure C) gradually rising warm air D) clear skies behind the front
A car that is initially moving at 7.50 m/s begins to accelerate forward uniformly at 0.550 m/s2
(a) How long after beginning to accelerate does it take the car to move 3.50 km? (b) How fast is the car moving just as it has traveled 3.50 km? What will be an ideal response?