1. Intro to Physics Units

Which of the following is the SI unit for momentum?

Sirius is one of the brightest stars visible from Earth. Approximately how far away is Sirius from Earth in $AU$ (astronomical units)?

Which of the following is the SI unit of energy?

A constant, stable guide to which all lengths are directed is referred to as a:

Which of the following best describes a downburst and explains why it is hazardous to airplanes?

A bicycle wheel has a diameter of $63$ centimeters. What is the diameter in meters?

Why is a cubic centimeter (${\mathrm{cm}}^3$) considered an example of a derived unit?

Which of the following objects is opaque?

In the context of measuring physical quantities, what does a reference point provide?

Aerial cable bus conductors take up what amount of space compared to bare conductors that are installed on a pole?

Which of the following objects has the largest $radius$?