A white dwarf star is prevented from collapsing by
a. nuclear energy it is generating.
b. its gravitational force.
c. Hubble's law of extragalactic redshifts.
d. degenerate electron gas pressure.
e. degenerate astronomers observing the star.
d
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Constant Acceleration Kinematics: At the instant a traffic light turns green, a car that has been waiting at the intersection starts ahead with a constant acceleration of 2.00 m/s2. At that moment a truck traveling with a constant velocity of 15.0 m/s overtakes and passes the car.(a) Calculate the time necessary for the car to reach the truck.(b) Calculate the distance beyond the traffic light that the car will pass the truck.(c) Determine the speed of the car when it passes the truck.
What will be an ideal response?
Reactance: A simple ac circuit consists of an inductor connected across the terminals of an ac power source. If the frequency of the ac source is decreased by a factor of four, what happens to the reactance of the inductor?
A. It decreases by a factor of four. B. It decreases by a factor of eight. C. It increases by a factor of two. D. It increases by a factor of four. E. It increases by a factor of eight.
A small object has charge Q. Charge q is removed from it and placed on a second small object. The two objects are placed 1 m apart. For the force that each object exerts on the other to be a maximum, q should be:
A) 2Q B) Q C) Q/2 D) Q/4 E) 0
State Kepler's first law
What will be an ideal response?