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Physics of Measurement and Definitions

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Questions and Answers

What is the volume of the platinum and iridium cylinder used to define the kilogram?

10 cm³

1,000 cm³ (correct)

10,000 cm³

1 cm³

Which of the following statements accurately describes the current definition of the kilogram?

It is defined by the gravitational force exerted on a specific object at a specific location.

It is defined by the mass of a specific volume of water.

It is defined as the mass of one liter of pure water at 4°C.

It is defined by a metal cylinder of platinum and iridium. (correct)

What is the current definition of the second?

It is defined by the time it takes light to travel a specific distance in a vacuum.

It is defined by the frequency of the radiation associated with an atomic transition of Cesium-133. (correct)

It is defined as 1/86400 of the mean solar day.

It is defined as the time it takes for the Earth to complete one rotation.

Which of the following is NOT a base quantity?

<p>Volume (D)</p> Signup and view all the answers

What is the frequency of the radiation associated with the atomic transition of Cesium-133 that defines the second?

<p>9,192,631,770 oscillations per second (C)</p> Signup and view all the answers

Flashcards

Mass

Mass is the base quantity describing the amount of substance.

Kilogram Definition

A kilogram is now defined by a metal cylinder of platinum and iridium.

Platinum-Iridium Cylinder

The cylinder defining a kilogram is a cube with sides of 0.10 m (10 cm).

Time

Time is a base quantity used to measure duration.

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Second Definition

A second is defined by the oscillation frequency of Cesium-133.

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Physics of Measurement and Definitions

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Podcast

Questions and Answers

What is the volume of the platinum and iridium cylinder used to define the kilogram?

Which of the following statements accurately describes the current definition of the kilogram?

What is the current definition of the second?

Which of the following is NOT a base quantity?

What is the frequency of the radiation associated with the atomic transition of Cesium-133 that defines the second?

Flashcards

Mass

Kilogram Definition

Platinum-Iridium Cylinder

Time

Second Definition

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