In the Northern Hemisphere, the Coriolis force causes all free-moving objects in the air to curve
A) to the left of their intended path.
B) to the right of their intended path.
C) counterclockwise to their intended path.
D) clockwise to their intended path.
Answer: B
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When an object is moving in simple harmonic motion, which of the following is at a minimum when the displacement from equilibrium is zero?
a. the magnitude of the velocity c. the kinetic energy b. the magnitude of the acceleration d. the total mechanical energy
Earth's magnetic field:
A) prevents charged particles in the solar wind from reaching the surface. B) is a remnant of the solar nebula's magnetic field. C) is weakening the Van Allen radiation belts. D) is the force behind plate tectonics. E) lines intersect the atmosphere at the equator.
Acceleration: An airplane increases its speed at the average rate of 15 m/s2. How much time does it take to increase its speed from 100 m/s to 160 m/s?
A. 17 s B. 0.058 s C. 4.0 s D. 0.25 s
An object is held at a distance of 19.0 cm from a convex mirror creating an image that is 1/6 the object size. What is the focal length of the mirror?
a. –3.8 cm b. 16 cm c. –2.7 cm d. –8.8 cm e. 23 cm