Which of the following take place in the combustion chamber of a gas turbine engine

Which of the following are considered noble gases? a. bromine b. neon c. argon d. chlorine

Suppose a comet has an orbital period of 309.1 years around the sun. what is it’s average distance from the sun?

Greg drew a diagram to compare two of the fundamental forces. which labels belong in the areas marked x, y and z? gravitational force electromagnetic force x. attractive y repulsive z: infinite range x: infinite range y attractive z. repulsive x. always attractive y: infinite range z: attractive or repulsive x. attractive or repulsive y infinite range z: always attractive