If Speed = Distance / Time, then a marble rolling 49 cm in 7 seconds is moving at
343 cm/s
.142 cm/s
7 cm/s
not moving at all.

State the right hand rule of the direction of magnetic field in a conductor carrying current

What makes thermal imaging cameras useful? they can detect differences in color. they can detect differences in wave speeds. they can detect differences in temperature. they can detect mechanical waves.

Imagine that someone pushes one marble toward a motionless marble. would there still be action-reaction forces involved in the collision? how might the marbles’ motions be changed? ?