Leptons can interact by which of the following forces?
A) strong nuclear force, weak nuclear force, electromagnetic force, gravitation
B) strong nuclear force, weak nuclear force, electromagnetic force
C) weak nuclear force, electromagnetic force, gravitation
D) strong nuclear force, weak nuclear force
E) strong nuclear force, electromagnetic force, gravitation
C
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Each atom in a 7.0 microgram piece of calcium (A=40, Z=20) has one electron removed. What is the total charge collected in this way?
A. 34 mC B. 670 mC C. 17 mC D. 60 mC
Protoplanets of the Jovian planets could have grown very hot from
a. heat for the sun. b. radioactivity of light elements such as hydrogen and helium. c. the in fall of material at high velocity. d. tidal forces due to the sun. e. collisions with large planetesimals.
A certain photon after being scattered from a free electron at rest moves at an angle of 120° with respect to the incident direction. If the wavelength of the incident photon is 0.591 nm, what is the wavelength of the scattered photon?
A) 0.380 nm B) 0 nm C) 0.550 nm D) 0.591 nm E) 0.595 nm
When steam condenses to water, energy is
A) absorbed. B) released. C) conserved as the phase change occurs. D) transformed to a different form.