A1200 kg car traveling east is 4.5 m/s crashes into the side of a 2100 kg truck that is not moving. during the collision, the vehicles get stuck together. what is ther velocity after the collision

Avalue that describes how heavy an object is and is related to the force of gravity is

What sort of waves exhibit the doppler effect?

Objects a and b are visible in the night sky. six months later they are still visible, but object b shows less parallax than object a. which object is closer? a. a b. b c. you would need to wait another six months in order to figure this out. d. you would need to know the objects' angular diameters in order to figure this out.