What is the value for (2+3)(4)

Water (2510 g ) is heated until it just begins to boil. if the water absorbs 5.09×105 j of heat in the process, what was the initial temperature of the water?

According to coulomb's law, how would the electrical force between particles change if the product of their electrical charge increased?

Which characteristics can be used to differentiate star systems? check all that apply.