A Stream of Gas Consists of N Molecules $\degree$ C)mnv Sin 30

question 45

Multiple Choice

A stream of gas consists of n molecules.Each molecule has mass m and speed v.The stream is reflected elastically from a rigid surface as shown.The magnitude of the change in the total momentum of the stream is:

• A)2mnv
• B)2mnv sin 30 \(\degree\)
• C)mnv sin 30 \(\degree\)
• D)mnv cos 30 \(\degree\)
• E)mnv