When the Earth's and Moon's centers are 59 Earth radii apart, what is the ratio of the lunar gravitational force on a 2-kg mass at the point on the Earth nearest to the Moon to the lunar gravitational force on a 2-kg mass at the point on the Earth farthest from the Moon?
a. 118/59
c. (60/58)2
b. (58/60)2
d. The value is not given.
C
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The half-life of a muon is 2.2 ms. How fast is it moving relative to an observer who says its half-life is 4.4 ms?
a. 0.87 c b. 0.75 c c. 0.97 c d. 0.72 c e. 0.50 c
If a stone is dropped so that the initial gravitational potential energy of the system stone-Earth is 100 J but it reaches the ground with a kinetic energy of only 75 J, this is a violation of the principle of conservation of energy
A) True B) False
Exhibit 4-2
Newton approximated motion in a circle as a series of linear motions, as in the polygon below.
Assume that the particle moves at constant speed vA from A to B, and at constant speed vB from B to C.
Use this exhibit to answer the following question(s).
Refer to Exhibit 4-2. The direction of the acceleration,
, at point B, is shown by the arrow ina.
Physics & Space Science
Why is the wire connecting your dryer to the circuit breaker in your house thicker (of greater diameter) than the wire connecting a table lamp to the electric outlet?
What will be an ideal response?