Plutons form from magma
A) at Earth's surface.
B) below Earth's surface.
C) ejected from volcanoes.
D) all of these
Answer: B
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A torsion pendulum consists of a uniform rod hanging horizontally from thin wire tied to its center
When the wire is twisted through an angle ?, the wire exerts a torque ? = -??, where ? = 0.0016 Nm/rad. The rod has a mass of 35 grams and is 10 cm long. What is the period of the torsional oscillations of the pendulum? A) 0.85 s B) 1.4 s C) 0.99 s D) 2.1 s E) 0.023 s
Which of the following materials present in the solar system had the highest condensation temperatures?
A) metals B) rocks C) hydrogen and helium gases D) hydrogen compounds like water, methane, and ammonia
Explain why stars form only in molecular clouds, the coldest, densest parts of the interstellar medium
What will be an ideal response?
During the time that the acceleration of a particle is constant, its velocity-vs.-time curve is
A) a straight line. B) a parabola opening downward. C) a parabola opening upward. D) a parabola opening toward the left. E) a parabola opening toward the right.