Two spaceships are approaching one another, one with speed v1 and the other with speed v2 . Neither speed is 0 . Their speed of approach, according to Newtonian mechanics, is v1 + v2 . Special relativity tells us that the speed of approach
a. is more than the Newtonian value if each speed is more than half the speed of light.
b. is always greater than the Newtonian value.
c. is the same as the Newtonian value if each speed is less than half the speed of light.
d. is always less than the Newtonian value.
d
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Electrons emitted when light strikes the surface of a metal is
a. photon emission b. photon absorption c. the photoelectric effect d. a laser e. an emission spectrum
When star light passes by the sun
A) it is unaffected by the sun. B) it is deflected away from the sun. C) it is deflected toward the sun. D) it is absorbed by the sun.
The probability cloud for the electron in the hydrogen atom has an average radius
A) quite different from the radius predicted by Bohr. B) in agreement with the orbital radius of Bohr. C) as yet not accurately measured.
An object that is moving with an acceleration different from zero will always have a(n) ______________ velocity
a. changing b. increasing c. constant d. decreasing