A Helium Atom (Mass = 4m) Moving with Speed

question 44

Multiple Choice

A helium atom (mass = 4m) moving with speed collides elastically with a deuterium (hydrogen 2 ) atom (mass = 2m) at rest. Calculate the percentage change in the kinetic energy of the helium atom after the collision.

• A) 11%
• B) 36%
• C) 50%
• D) 64%
• E) 89%

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