Use the data from the following figures to answer the questions below. SUBSTANCE
DENSITY_9
cm
cork
0.22
water
1.0
sugar
1.6
aluminum
2.7
79
gold
19.3
02000 Ossewwe, in
The cube has a mass of 72.9 g.
iron
3 cm
3 cm
3 cm
2008 Ogsewu, in
What is its density in g/cm?
What substance is it?

2.7g/cm³

Aluminum

Explanation:

Given parameters:

Mass of the cube  = 72.9g

Unknown:

Density of the cube = ?

Solution:

To solve this problem, we need to find the density of the cube. The mass is given and the dimensions of the solid figure.

Now;

       Density is the mass per unit volume of a substance

     Density  =  

Volume of the cube  = L³  = 3³   = 27cm³

So;

     Density  =   = 2.7g/cm³

The body is aluminum because it has a density of  2.7g/cm³

on passing the small ampere of electric current through the tube made of ar and hg of cfl generates uv rays which excites the fluorescent and thus emits the high radiation by consumption of just 5- 12 w in comparison to incandescent light which requires more power such as around 40 - 55 w to lighten.

moreover the life span of fluorescent or cfl is around 8000 h whereas the life span of incandescent is around 1200 h

hence, the building installed with incandescent lights bears more electricity bill.