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18 Questions

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SI Units and Constants

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Questions and Answers

What is the SI unit of time?

minute

hour

day

second (correct)

What is the SI unit of mass?

gram

pound

tonne

kilogram (correct)

What is the unit of the Planck constant h?

kg/s

J/kg

kgm/s

Js (correct)

What is the unit of the Boltzmann constant k?

JK–1 Signup and view all the answers

What is the unit of electric current?

A Signup and view all the answers

What is the unit of thermodynamic temperature?

K Signup and view all the answers

Which of the following states of matter has the fastest movement of particles?

Gas Signup and view all the answers

What is the result of heating a solid?

It changes to a liquid Signup and view all the answers

What is the characteristic of a solid in terms of volume and shape?

It has definite volume and shape Signup and view all the answers

What happens when a gas is cooled?

It changes to a liquid Signup and view all the answers

What is the characteristic of a liquid in terms of shape?

It takes the shape of the container Signup and view all the answers

What is the result of further cooling a liquid?

It changes to a solid Signup and view all the answers

What is the SI unit of length?

metre Signup and view all the answers

What is the symbol for the SI unit of thermodynamic temperature?

K Signup and view all the answers

What is the purpose of the prefixes in the SI system?

To indicate the multiples or submultiples of a unit Signup and view all the answers

How many base units are there in the SI system?

7 Signup and view all the answers

What is the name of the conference that established the SI system?

Conference Generale des Poids et Measures Signup and view all the answers

What is the symbol for the SI unit of amount of substance?

mol Signup and view all the answers

Study Notes

SI Units

The SI unit of time is the second (s).
The SI unit of mass is the kilogram (kg).
The Planck constant (h) has the unit of joule second (Js).
The Boltzmann constant (k) is measured in joules per kelvin (J/K).
The unit of electric current is the ampere (A).
The SI unit of thermodynamic temperature is the kelvin (K).
The symbol for the SI unit of thermodynamic temperature is K.
The SI unit of length is the meter (m).
The symbol for the SI unit of the amount of substance is mole (mol).

Matter Properties

Among states of matter, gases have the fastest movement of particles.
Heating a solid typically results in expansion and a transition into a liquid state.
A solid maintains a definite shape and volume.
When a gas is cooled, it typically experiences contraction and may condense into a liquid.
Liquids take the shape of their container but have a definite volume.
Further cooling a liquid can lead to a transition into a solid state.

SI System

The SI system utilizes prefixes to denote multiples and submultiples, enhancing clarity and range in measurements.
There are a total of seven base units in the SI system.
The Conférence Générale des Poids et Mesures (CGPM) established the SI system.

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Description

Test your knowledge of the definitions of SI units, including the meter, kilogram, and second, as well as fundamental constants like the speed of light and Planck's constant. Understand how these units are defined in terms of each other and the underlying physical constants.