A Platinum Wire Is Used to Determine the Melting Point

question 35

Multiple Choice

A platinum wire is used to determine the melting point of indium.The resistance of the platinum wire is 2.000 Ω at 20°C and increases to 3.072 Ω as the indium starts to melt.What is the melting point of indium? The temperature coefficient of resistivity for platinum is

• A) 120°C
• B) 140°C
• C) 160°C
• D) 240°C
• E) 350°C

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Definitions:

Independent Variable

The variable in an experiment that is manipulated or changed to test its effects on the dependent variable.

Empathy

Reacting to another person’s emotional state by experiencing the same emotional state.

Hypothesis

a proposed explanation for a phenomenon, made as a starting point for further investigation, which can be tested through experimentation or observation.

Accomplices

Individuals who knowingly and voluntarily participate in the commission of a crime or act, aiding the primary actors.