Question

Which situation best represents a closed environment?(1 point)
Responses

two balls colliding in deep space
two balls colliding in deep space

two balls colliding under water
two balls colliding under water

two balls colliding on a pool table
two balls colliding on a pool table

two balls colliding in midair
two balls colliding in midair

Answer 1

Two balls colliding in deep space.

Reason: deep space approximates an isolated/closed system (no external forces or matter exchange), so momentum and energy are conserved in the collision.