Physics Lecture 1: Units & Definitions

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Questions and Answers

What is the primary goal of physics?

to explain how things move in space and time and understand how the universe behaves

What are the four laws of symmetry and conservation mentioned in the text?

energy, momentum, charge, and parity

What is the branch of physics that helped develop the mathematical field of calculus?

mechanics

What is the oldest natural science mentioned in the text?

astronomy Signup and view all the answers

What is the process of computing the amount of an unknown physical quantity using a standard known quantity called?

measurement Signup and view all the answers

What is the branch of science that deals with the structure of matter and the interactions of the universe's fundamental constituents?

physics Signup and view all the answers

What is a fundamental unit and give an example of it?

A fundamental unit is a unit used to measure fundamental quantities and can express itself without the assistance of any other units. An example of a fundamental unit is kilogram (kg) for mass. Signup and view all the answers

What is a derived unit and give an example of it?

A derived unit is a unit of measurement of a derived quantity and cannot be expressed in the absence of fundamental units. An example of a derived unit is Newton (N) for force. Signup and view all the answers

What is the relationship between fundamental units and derived units?

Derived units cannot be expressed in the absence of fundamental units, and they can be broken down into multiple fundamental units. Signup and view all the answers