A Subatomic Particle X Spontaneously Decays into Two Particles, a and B

question 15

Multiple Choice

A subatomic particle X spontaneously decays into two particles, A and B, each of rest energy 1.40 × 10² MeV. The particles fly off in opposite directions, each with speed 0.827c relative to an inertial reference frame S.
-Which one of the following statements concerning particle X is true?

• A)Momentum conservation requires that it was moving in frame S.
• B)Energy conservation requires that it must have been at rest in frame S.
• C)Momentum conservation requires that it must have been at rest in frame S.
• D)Energy conservation requires that its total energy was 280 MeV in frame S.
• E)There is not enough information to determine its state of motion at the time of the decay.

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Definitions:

Common Stock

A form of corporate equity ownership, a type of security that represents ownership in a corporation and a claim on part of the corporation's profits.

Note Payable

A written promise to pay a specific sum of money, usually with interest, on a certain date or dates to the holder of the note.

Accounts Payable

Liabilities representing amounts owed to creditors for goods and services received but not yet paid for.

Additional Paid-in Capital

The amount of money paid by investors for shares above the par value, typically reflecting the excess over the nominal value of shares issued.