whats the mass of a copper cylinder that has a length of 5 cm and a diameter of 3 cm?

Question

anonymous · Answer

ok so you first have to know what the density of copper is which is 8.9 g/cm3

anonymous · Answer

then you have to find the volume of the cylinder using the formula that i will now draw

anonymous · Answer

nvm. its area of base x length

anonymous · Answer

to find the area of the base you use the equation of area of a circle which is

anonymous · Answer

|dw:1316398950684:dw|

anonymous · Answer

the diameter is 3 so the radius is 1.5. plug the number in and you get 7.07cm2

anonymous · Answer

multiply that by the length (5) and you get 35.34cm3

anonymous · Answer

now....we know that 1 cm3 of copper has a mass of 8.9g. the cylinder has a volume of 35.34 cm3. multiply 35.34cm3 by 8.9g and you get 314.55 g

anonymous · Answer

that is the mass of the cylinder