Observations of the cosmic background radiation from the COBE satellite revealed tiny variations in its temperature by about 1 part in 100,000
Indicate whether the statement is true or false
TRUE
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A 60.0-kg person rides in an elevator while standing on a scale. The scale reads 400 N. The acceleration of the elevator is closest to
A) 3.13 m/s2 downward. B) 6.67 m/s2 downward. C) zero. D) 9.80 m/s2 downward. E) 6.67 m/s2 upward.
The center of the universe:
A) is the Milky Way. B) is the Sun. C) is Earth. D) is where the Big Bang happened. E) does not exist anywhere in space.
The circuit below shows three resistors in series. R3 > R2 > R1. The resistors are all made of the same wire with the same diameter but have different lengths. Rank the magnitudes of the electric fields in the resistors from least to greatest
a.
E3 < E2 < E1.
b.
E2 < E1 = E3.
c.
E1 = E2 = E3.
d.
E1 = E3 < E2.
e.
E1 < E2 < E3.
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?