A florescent light tube usually contains what?

A a vacuum

B oxygen

C. Mercury vapor

D. Light emitting diodes

Identify five main components of the atmosphere

A certain atom has 26 protons, 26 electrons, and 30 neutrons. It mass number is?

Select the smallest value from the choices below. (A) 15 x 10-3 (B) 0.15 x 100 (C) 0.00015 x 103 (D) 150 x 10-3 (E) 0.00000015 x 106

Starting from rest, how long does it take a moving man to reach a velocity of 5 m/s if his acceleration is + 1.75 m/s2?

What is the speed of a car with mass of 200kg and acceleration of 5

Which force does not operate at a distance of 1 m? A. Weak nuclear O B. Electric C. Gravitational D. Magnetic

The deflection of alpha particles in rutherford's gold foil experiments resulted in what change to the atomic model?

What happens during evaporation? A liquid changes to a gas. A liquid changes to a solid. A gas changes to a liquid. A solid changes to a liquid.

In a nuclear reaction, what is the name for the difference in mass when one type of matter is converted into another? A. radiation B. nucleons C. antimatter D. mass defect

Aspect of the physical world