Volume of the metal = change in volume reading
Volume = 37.4 - 33
Volume = 4.4 ml
Density = mass / volume
Density = 7.101 / 4.4
Density = 1.61 g/ml
I believe it can be warm because usually the surface below us is warm itself, causing the air to be warm as well. The temperature can vary as well
L×w×h=v
length times width times height equals volume
the order in which you multiply does not matter
