HARD
Diploma
IMPORTANT
Earn 100
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Use the electromagnetic vertex to draw a Feynman diagram for the scattering of a photon off a positron.
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Important Questions on Atomic, Nuclear and Particle Physics
MEDIUM
Diploma
IMPORTANT
How would the decay of a nucleus of into a nucleus of be described?
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HARD
Diploma
IMPORTANT
The activity of a sample containing a radioactive element is . After minutes the activity is . What is the halflife of the sample?
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EASY
Diploma
IMPORTANT
A sample contains a small quantity of a radioactive element with a very long halflife. The activity is constant and equal to . The temperature of the sample is increased. What are the effects if any, on the halflife and activity of the sample?
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MEDIUM
Diploma
IMPORTANT
What is the common characteristic of most nuclei with mass number greater than about ?
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MEDIUM
Diploma
IMPORTANT
The binding energy per nucleon for is about . What is the minimum energy needed to separate the nucleons of ?
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HARD
Diploma
IMPORTANT
The reaction is impossible. Which conservation law would be violated if the reaction occured?
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HARD
Diploma
IMPORTANT
What are the charge and strangeness of the baryon ?
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MEDIUM
Diploma
IMPORTANT
What process does this Feynman diagram represent?
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