A dark object sitting in sunlight gets warm. The sun radiates light because it is very hot, much hotter than the object. So should we categorize the radiation that the object receives from the sun as being heat Q or energy transferred by electromagnetic radiation [EER]? Be prepared to justify your answer with an argument (multiple reasonable arguments are possible).
A. Heat Q
B. Energy transfer [EER]
C. It depends on how we define the system boundary.
D. It doesn’t matter.
C. It depends on how we define the system boundary.
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Using a digital balance the mass of a certain piece of wood is read as 12.946 g. Thinking in terms of accuracy and significant figures, what value would you record on your data sheet if the balance is accurate to one-tenth of a gram?
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An object in uniform circular motion has
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Zero degrees on the Celsius scale
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