A feather and a coin will have equal accelerations when falling in a vacuum because
A) their velocities are the same.
B) the force of gravity is the same for each in a vacuum.
C) the force of gravity does not act in a vacuum.
D) the ratio of both the feather's and coin's weight to mass is the same.
E) none of the above
Answer: D
You might also like to view...
A region in the Universe where there are almost no galaxies is called a ________.
A. void B. supermassive black hole C. dark nebula D. zone of avoidance
Uniform Circular Motion: When an object moves in uniform circular motion, the direction of its acceleration is
A. in the same direction as its velocity vector. B. in the opposite direction of its velocity vector. C. is directed toward the center of its circular path. D. is directed away from the center of its circular path. E. depends on the speed of the object.
Determine the current in the 10-V emf.
A. 2.3 A B. 2.7 A C. 1.3 A D. 0.30 A E. 2.5 A
Conversion of Units: A typical ruby-throated hummingbird is 8 cm long. Express its length in millimeters and micrometers (µm).
A. 80 mm; 800 µm B. 80 mm; 80,000 µm C. 800 mm; 0.008 µm D. 800 mm; 0.8 µm E. 0.8 mm; 8000 µm