If a star is moving away from the earth, toward which color will it's visible light be shifted?

a. red

b. white

c. blue

Which quantities are scalars? choose all that apply a.distance b.speed c. acceleration d.velocity

Blank liquids and gases exert a buoyant force on objects placed in them

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?