A Thermo Keeps a Hot Drink Hot and a Cold

question 31

Multiple Choice

A thermo keeps a hot drink hot and a cold drink cold for a long time. Shown below is a cut-away section of a thermo with the important features labeled. The reason for the silvered double-wall vacuum chamber is

• A) the silvered surfaces reflect any radiation while the vacuum suppresses heat losses by convection and heat conductivity.
• B) people like silvery thing so it is a marketing tool. The vacuum keeps the container clean.
• C) the silvered surfaces suppresses heat conduction and convection and the vacuum prevents radiated heat.
• D) because putting silvery surface is easy to manufacture, and while they are at it, might as well put a vacuum in between.
• E) none of the above

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Definitions:

Standard Error

A statistical measure that estimates the accuracy with which a sample distribution represents a population by using the standard deviation.

Dependent Variable

Outcomes or responses that researchers are interested in explaining or predicting, which change in response to independent variables.

Standard Error Of Estimate

A measure of the accuracy with which a sample distribution represents a population by quantifying the dispersion of sample mean values around the true population mean.

Predicted Values

Estimates or forecasts of outcomes generated by a model based on known data and relationships.