A body oscillates with simple harmonic motion along the x axis. Its displacement varies with time according to the equation x = 5.0 cos (?t). The magnitude of the acceleration (in m/s2) of the body at t = 1.0 s is approximately
a. 3.5.
b. 49.
c. 14.
d. 43.
e. 4.3.
b
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A star's absolute visual magnitude depends only on the star's ______ and _____
a. temperature; mass b. diameter; mass c. temperature; density d. diameter; density e. distance; magnitude
Our whole galaxy is about ____ times larger in size.
A.) 100. B.) 1,000. C.) 10,000. D.) 100,000. E.) 1,000,000.
The acceleration of a ball as it rolls down a ramp is 3 m/s2 . It starts from rest. (a) What is the ball's speed after 4 seconds? (b) How far does the ball travel during the 4 seconds?
The old surfaces of icy satellites of Jovian planets
a. appear dark in color with few impact craters. b. appear dark in color with many impact craters. c. appear very bright because ice is very reflective. d. generally show long bright grooves and a modest number of impact craters. e. generally have small volcanoes that are active.