A Helium Atom (Mass = 4m)moving with Speed Collides

question 31

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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