Asked by Mely


The density of iron is 7.87 . What is the mass of a (variable l)* 4.00cm * 1.00 cm block of iron?
Answered by DrBob222
7.87 WHAT?
AND you can't have two unknowns. One is mass, the other is l. What is l?
Answered by DrBob222
However, you CAN solve for mass in terms of l.
Answered by Mely
7.87 g/ml
Answered by DrBob222
v = length*4*1 = 4*length

mass = volume x density
mass = 4*length*7.87 = 31.48*length
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