What happens to the kinetic energy of a speedy proton when its relativistic mass doubles?
A) It doubles.
B) It more than doubles.
C) It less than doubles.
D) It must increase, but it is impossible to say by how much.
B
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The temperature of a room is 300 K. What is the temperature in Fahrenheit?
A. 70.1
B. 74.2
C. 78.5
D. 80.3
E. 85.2
A bird sitting on the limb of a tree is moving about 30 km/s with respect to the Sun. If the bird takes 1 second to drop down to a worm below, the worm would be 30 km downrange from the bird when it reached the ground
This faulty reasoning is best countered with Newton's A) law of inertia. B) law of gravity. C) laws of motion. D) none of the above
Assume a uniformly charged ring of radius R and charge Q produces an electric field Ering at a point P on its axis, at distance x away from the center of the ring as in Figure OQ23.13a. Now the same charge Q is spread uniformly over the circular area the ring encloses, forming a flat disk of charge with the same radius as in Figure OQ23.13b. How does the field Edisk produced by the disk at P
compare with the field produced by the ring at the same point?
A 12.6-V battery supplies a 2.0-A current for 2.0 minutes. What is the work done by the battery during this process?
a. 0 J c. 2.5 × 10^2 J b. 3.0 × 10^3 J d. 1.5 × 10^4 J