two objects attract each other gravitationally with a force of 2.1×10−10 n when they are 0.50 m apart. their total mass is 4.8 kg .

c.is a substance that requires a small amount of energy per gram to raise its temperature; has strong cohesive forces between molecules.

explanation:

a colorless, transparent, odorless liquid that forms the seas, lakes, rivers, and rain and is the basis of the fluids of living organisms.

as a general rule, scissors have blades less than 6 in (15 cm) long and usually have handles with finger holes of the same size. shears have blades scissors used to cut hair or fabric must be much sharper.

this could be newton#'s law of cooling. the cooling curve is exponential