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

question 25

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

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Definitions:

Appearance-reality Distinction

The appearance-reality distinction is a cognitive development concept, indicating a child's ability to differentiate between how things seem and how they actually are.

Mental Representation

Internal cognitive symbols that represent external reality or mental imagery, used in thought processes to understand and interact with the world.

Mass

A measure of the amount of matter in an object, often confused with weight, which is the force exerted by gravity on an object.

Cross-culturally

Relating to or involving comparison between two or more cultures to explore their differences and similarities, often used in research to understand universal versus culture-specific behaviors and practices.