The cylinder of aluminum in class was approximately 13mm in circumference and 42mm in length. What would be it's approximate mass?

Mass, m = 1.51 grams

Explanation:

It is given that,

The circumference of Aluminium cylinder, C = 13 mm = 1.3 cm

Length of the cylinder, h = 4.2 cm

We know that the density of the Aluminium is 2.7 g/cm³

Circumference, C = 2πr

Density is equal to mass per unit volume.

m is mass of the cylinder

V is the volume of the cylinder

So,

So, the mass of the cylinder is 1.51 grams.

c- cold periods in earth's history during which glaciers covered much of the surface.

explanation:

"record the time to complete a chemical reaction" would most likely be part of a lab procedure.