Which best explains why the noble gases are chemically unreactive? They have no valence electrons. They have the same number of protons and electrons. They have more neutrons than protons. They have very stable outer electron shells.

In science, all concepts are a) opinions and facts. B) beleifs that are familiar and complicated. c) testable and observable. D) theories that cannot be proven.

A 96.1 kg man sits on the stern of a 6 m long boat. The prow of the boat touches the pier, but the boat isn't tied. The man notices his mistake, stands up and walks to the boat's prow, but by the time he reaches the prow, it's moved 3.

The amount of pressure in a gas is measured in pascals. true or false

Explain what happens to a boat on a river when a man jumps out of it into a nearby shore

A man pulls on his dog leash to keep him from running after bicycle which term best describes this example? A) negative work B) positive work C) negative work D) positive force

A truck moving at 45 m/s passes a police car moving at 36 m/s in the opposite direction. if the frequency of the siren is 500 Hz relative to the police car, what is the frequency heard by an observer in the truck after the police car passes the

How do you increase the mechanical advantage of a ramp?

Which of the following groups of moon phases are above the horizon at 8 am? A third quarter, waning crescent, and waxing gibbous OB. new Moon, third quarter, and waning gibbous OC. waxing gibbous, full Moon, waning gibbous O D.

The Yerkes refracting telescope has a 1.00 m diameter objective lens of focal length 20.0 m. Assume it is used with an eyepiece of focal length 2.50 cm. (a) Determine the angular magnification of the planet Mars through this telescope.

What must a mechanical wave travel through