Why? I need some help I would like at least 1 answer

Thanks,
Vishnu

50 g of ice at 0°c is dropped in a beaker containing 100 g of water at 0°c. what will be the contents of the beaker after 5 hours? assume that the room temperature is 0°c.

What is meant by the statement" the melting poin of glycerine is 13 degree celsius

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? ?