Which force can affect an object without direct physical contact?

a)friction
b)gravity
c)push or pull
d)tension

Which is not an example of how an object gains elastic potential energy by stretching? a. jumping on a pogo stick b. pulling on a rubber band c. jumping on a trampoline

How to tell if two objects are in thermal equilibrium 1.the objects have the same temperature 2.the objects are the same size 3.the objects are touching each other 4.the objects temperatures are changing

Which of the following is not a physical property of mattera. melting pointb.heat of combustionc. viscosityd. boiling point