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Question
A charged capacitor stores 10 C at 40 V. Its stored energy is:A) 400 J
B) 200 J
C) 4 J
D) 2.5 J
E) 1.25 J
Answer
This answer is hidden. It contains 1 characters.
Related questions
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The intensity of the microwave background radiation, a remnant of the big bang:
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D) is proportional to the square of the distance from us
E) is nearly the same in all directions
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The velocities of distant objects in the universe indicate that the time elapsed since the big bang is about:
A) 105y
B) 1010y
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B) two quarks and an antiquark
C) one quark and two antiquarks
D) one quark and one antiquark
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Q:
Any meson is a combination of:
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C) one quark and two antiquarks
D) one quark and one antiquark
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Q:
Quarks are the constituents of:
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C) all strongly interacting particles
D) only strange particles
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Q:
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Q:
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Strangeness is conserved in:
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E) some strong particle decays
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A) a proton
B) an omega minus
C) a sigma
D) an antiparticle
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Q:
A neutral lepton cannot decay into two neutrinos. Of the following conservation laws, which would be violated if it did?
A) Energy
B) Baryon number
C) Linear Momentum
D) Angular momentum
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Q:
An electron participates in:
A) the electromagnetic and weak forces only
B) the strong and weak forces only
C) the electromagnetic and gravitational forces only
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Q:
An example of a fermion is a:
A) photon
B) pion
C) neutrino
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A particle with spin angular momentum is called a:A) leptonB) hadronC) fermionD) bosonE) electron
Q:
The microwave background radiation is a result of the big bang. The big bang also resulted in a uniform distribution of background:
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B) quarks
C) gluons
D) neutrinos
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Compared to fusion in a tokamak, laser fusion makes use of:
A) smaller particle number densities
B) greater particle number densities
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D) higher temperatures
E) lower temperatures
Q:
For a controlled nuclear fusion reaction, one needs:
A) high number density nand high temperature T
B) high number density nand low temperatureT
C) low number density nand high temperature T
D) low number density nand low temperature T
E) high number density nand temperature T = 0 K
Q:
The first step of the proton-proton cycle is:
Q:
Nuclear fusion in the Sun is increasing its supply of:
A) hydrogen
B) helium
C) nucleons
D) positrons
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Q:
The purpose of a moderator in a nuclear reactor is to:
A) provide neutrons for the fission process
B) slow down fast neutrons to increase the probability of capture by uranium
C) absorb dangerous gamma radiation
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Q:
In the normal operation of a nuclear reactor:
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D) the moderating fluid is continually recycled
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The energy supplied by a thermal neutron in a fission event is essentially its:
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B) binding energy
C) kinetic energy
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When 236U fissions the fragments are:
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B) always identical
C) never 140Xe and 94Sr
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Q:
A certain nucleus, after absorbing a neutron, emits a and then splits into two alpha particles. The (A, Z) of the original nucleus must have been:A) 6, 2B) 6, 3C) 7, 2D) 7, 3E) 8, 4
Q:
Radioactive polonium, 214Po (Z= 84), decays by alpha emission to:
A) 214Po (Z= 84)
B) 210Pb (Z= 82)
C) 214At (Z= 85)
D) 218Po (Z= 84)
E) 210Bi (Z= 83)
Q:
Rank the following collections of particles according to the total binding energy of all the particles in each collection, least to greatest. collection 1: 244Pu (Z = 94) nucleus alone collection 2: 240U (Z = 92) nucleus, particle collection 3: 240U (Z = 92) nucleus, two separated protons, two separated neutronsA) 1,2,3B) 3,2,1C) 2,1,3D) 1,3,2E) 2,3,1
Q:
Bombardment of 28Si (Z= 14) with alpha particles may produce:
A) a proton and 31P (Z= 15)
B) hydrogen and 32S (Z= 16)
C) a deuteron and 27Al (Z= 13)
D) helium and 31P (Z= 15)
E) 35Cl (Z= 17)