A vector has components Ax < 0, and Ay > 0, the angle that this vector makes with the positive x-axis must be in the range
A) 0° to 90°.
B) 90° to 180°.
C) 180° to 270°.
D) 270° to 360°.
B
Physics & Space Science
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The silica content of magma greatly affects its viscosity. Magma with a high silica content has a
A) high viscosity and flows quickly. B) high viscosity and flows slowly. C) low viscosity and flows quickly. D) low viscosity and flows slowly.
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Jogging Jake runs at 4 m/s along a train flatcar that moves at 10 m/s in the same direction. Jake's speed relative to the ground is
A) 6 m/s. B) 10 m/s. C) 14 m/s. D) none of the above
Physics & Space Science
Detailed measurements of the disk and central bulge region of our Galaxy suggest our Milky Way is a:
A) normal spiral galaxy. B) barred spiral galaxy. C) very flat elliptical galaxy. D) very dusty irregular galaxy. E) quasar.
Physics & Space Science