Protons are being accelerated in a particle accelerator. When the speed of the protons is doubled, their de Broglie wavelength will
A) increase by a factor of 4.
B) increase by a factor of 2.
C) decrease by a factor of 2.
D) increase by a factor of .
E) decrease by a factor of .
C
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A ball tossed vertically upward rises, reaches its highest point, and then falls back to its starting point. During this time the acceleration of the ball is always
A) in the direction of motion. B) opposite its velocity. C) directed upward. D) directed downward. E) none of the above
We have already launched at least four spacecraft that are bound for interstellar space
Indicate whether the statement is true or false
There are more large spiral galaxies than there are large elliptical galaxies
Indicate whether the statement is true or false
The strong force is mediated by
a. the gluon. b. the W– boson. c. the W+ boson. d. All of these choices.