The specific heat of aluminum is 0.902 J/g℃. A metal smith has 300. g of aluminum and wants to melt it down to make a lock. He increases the temperature from 20.℃ to 200.℃. How much heat does he need to apply?

the role of the microscope world in creating new materials .

the electrical  conductivity  of asolution  of an electrolyte is measured by determining the resistance of thesolution  between two flat or cylindrical electrodes separated by a fixed distance.

periodic trends is an atom that gets larger as the number of electronic shells increase, the radius of atoms increases as you go down a certain group in the periodic table of elements. in general, the size of an atom will decrease as you move from left to right of a certain period.