Which object would have a greater buoyant force: 350 g of copper (ρ= 8,890 kg/m3) or 350 g of ice (ρ= 917 kg/m3) if both are submerged in water?

An object moves from the position +34m to the position -15m in 15 seconds. what is it's total displacement? what is it's average velocity?

If the new moon happens on january 15th, what shape will it be on february 6th?

Abumper car with a mass of 250 kg is traveling at a speed of 4 m/s. this bumper car collides and sticks to a second bumper car with a mass of 250 kg, which is initially at rest. what is the final speed of these two bumper cars after the collision, assuming they remain stuck together?