Which Statement Below Regarding the First Law of Thermodynamics Is

question 10

Multiple Choice

Which statement below regarding the first law of thermodynamics is most correct?

• A)A system can do work externally only if its internal energy decreases.
• B)The internal energy of a system that interacts with its environment must change.
• C)No matter what other interactions take place, the internal energy must change if a system undergoes a heat transfer.
• D)The only changes that can occur in the internal energy of a system are those produced by non-mechanical forces.
• E)The internal energy of a system cannot change if the heat transferred to the system is equal to the work done by the system.

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Definitions:

Radiopaque Contrast Medium

A substance used in medical imaging to improve the visibility of internal structures in radiographic procedures.

Spinal Cord

The central nerve trunk that extends from the brain down through the vertebral canal and is responsible for transmitting messages between the brain and the rest of the body.

X-Ray Record

A medical image created by using X-rays to visualize the internal structure of the body, often used for diagnostic purposes.

Vacuum Tube

An electronic device that controls the flow of electricity in a vacuum between electrodes to which an external voltage is applied.