The difference between speed and velocity most involves
a. direction
b. amount
c. different units
d. acceleration

Molten iron fills a mould, which has a volume of 200 cm cubed. calculate the volume when the iron cools and solidifies. molten iron has a density of 7.0g/cm cubed. in its solid state, iron has a density of 8.0g/cm cubed.

Can anybody me with this? ? (picture included.)

The necleus of an atom is made up of what subatomic particles?