31. A student uses a measuring cylinder and a balance to find the density of oil. The diagram
shows the arrangement used.
A
m,
m₂
9
Which calculation gives the density of the oil?
empty
measuring
cylinder
B
V
(m₂-m₁)
C
m₂
m₂
9
measuring
cylinder containing
volume V of oil
oil
D
(m₂-m₁)
V