Two objects must be in contact for them to exert a force on each other.
true or false

How do we measure or think of speed in the united states?

You hang a book bag on a spring scale and place the bag on a platform scale so that the platform scale reads 23.7n and the spring scale reads 13.8n. what is the magnitude of the force that earth exerts on the bag?

An element becomes a positively charged ion when itloses protons.loses electrons.gains electrons.gains neutrons.