Which of the SI Standard Units Is NOT Based on a Constant

question 9

Multiple Choice

Which of the SI standard units is NOT based on a constant of nature?

• A)The meter, because the speed of light can vary from place to place.
• B)The second, because cesium cannot be found everywhere.
• C)The kilogram, because it is based on an arbitrary piece of metal.
• D)The kilogram, because the gram is the standard unit.
• E)The meter, because it is defined in terms of the speed of light in vacuum, and there is no perfect vacuum anywhere.

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Definitions:

Theoretically

Pertaining to or based on a theory; an explanation or system of ideas intended to explain something, especially one based on general principles independent of the thing to be explained.

Product Life Cycle

The process through which a product goes from when it is first introduced into the market through its decline or discontinuation.

Sales and Profits

Relates to the revenue generated from goods or services sold by a business and the financial gain remaining after all expenses have been deducted.

Diffusion of Innovation

The process by which a new idea, product, or practice spreads within a society or from one society to another.