When you heat up the matter, it gains energy and the bonds are broken. Then it will make solid become liquid
Answer: <u>Hydrogen.</u>
Explanation: <u>One problem with fuel-cell cars is that hydrogen gas is not readily available in pure form.</u> Fuel cell vehicles use hydrogen gas to power an electric motor. Unlike conventional vehicles which run on gasoline or diesel, fuel cell cars and trucks combine hydrogen and oxygen to produce electricity, which runs a motor. Hope this helps ^-^.
My mom is a teacher and she said can not be determined
The attraction between protons and electrons holds particles together. An electric charge can be either positive or negative. A positive electrical charge is called a proton. ... When an object loses electrons, it has a shortage of electrons, it has a shortage of electrons and is said to have a positive charge.
You can estimate by finding the measure/weight of a single penny and then finding the measure/weight of an empty coffee cup. Once you have that, weigh the whole thing and then go from there to find the amount of pennies :)