In the hydrogen atom the potential energy is negative, but the absolute value of the potential energy
a. is equal to the kinetic energy of the electron.
b. is twice the kinetic energy of the electron.
c. is half the kinetic energy of the electron.
d. is equal to n2 times the kinetic energy of the electron.
b
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When the intensity of light is increased in a photoelectric effect experiment, the energy of the emitted electrons __________
Fill in the blank(s) with correct word
Olber's paradox states that the ____
a. Universe must have a center, but not an edge b. sky should be as bright as the surface of a star in all directions c. Universe should have an edge, but not a center d. Earth should be at the farthest point in the Universe from the big bang. e. Universe is not infinite, but cannot have an edge or center
The superposition of two waves, 
and 
,results in a wave with a wavelength of
A.
m.B.
C.
D.
E.
If a car accelerates at a uniform 4.0 m/s2, how long will it take to reach a speed of 80 km/hr, starting from rest?
What will be an ideal response?