Hurry !
which physical properties do all stars have? check all that apply
-they are made of gases
-they shine very brightly
-they have spherical shape
-they contain iron in their cores
-they make energy through fusion

You've already seen the value of 9.8 in this lesson. what's this value called? what quantity does it represent?

On a frictionless air track, a blue glider with mass 0.200 kg is moving to the right with a speed of 8.00 m/s. it strikes a red glider that has mass 0.600 kg and that is initially at rest. after the collision, the blue glider is moving to the left with a speed of 3.00 m/s.(a) what are the magnitude and direction of the velocity of the red glider after the collision? (b) is this collision elastic?

How is an electron dot structure used to represent a covalent bond?