3. one grape is placed in tap water and
another grape is placed in salt water.
the change in their mass is measured
after a day. iv and dv

explanation:

the universal gravitation equation. since the gravitational force is directly proportional to the mass of both interacting objects, more massive objects will attract each other with a greater gravitational force. if the mass of one of the objects is doubled, then the force of gravity between them is doubled.

your body is trying to warm itself up. or more precisely, sensors in your skin send messages to your brain to generate heat to your body.