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15 Questions

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Physics Chapter on Quantities and Units

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Questions and Answers

Which of the following is a derived quantity?

Length

Time

Force (correct)

Mass

What is the SI unit for energy?

Joule (correct)

Bequerel

Newton

Watt

Which physical quantity is classified as a vector?

Temperature

Mass

Force (correct)

Energy

What is the unit for absorbed dose?

Gray Signup and view all the answers

Which of the following is NOT a scalar quantity?

Displacement Signup and view all the answers

Which derived quantity measures the rate of energy transfer?

Watt Signup and view all the answers

What is the unit symbol for radioactivity?

Bq Signup and view all the answers

What is defined as anything that has mass and occupies space?

Matter Signup and view all the answers

What does atomic mass refer to in an atom?

The number of protons and neutrons Signup and view all the answers

Which of the following statements about isotopes is true?

Isotopes have different numbers of neutrons in the nucleus. Signup and view all the answers

What is a molecule?

The smallest particle of a substance that retains its properties Signup and view all the answers

Which option describes what a compound is?

A substance made from two or more elements in a fixed ratio Signup and view all the answers

What does the atomic number of an element represent?

The number of protons in an atom Signup and view all the answers

How does weight differ from mass?

Weight is the force due to gravity on an object’s mass. Signup and view all the answers

In terms of atoms, which statement is correct?

Electrons equal the number of protons in an atom. Signup and view all the answers