I
II
Il
Il
11
No .
INC
C
.S
A rectangular container measuring 20 cm x 42 cm x 42 cm is filled with water.
(a) What is the volume of the container in cm??
(b) What is the volume of the container in mº?
(c) What is the volume of the container in mL (milli-Liters)?
(d) What is the volume of the container in Liters?
(e) What is the mass of the water in the container in grams?
(f) What is the mass of the water in the container in kilograms?

a) volume in cm³ = 20 × 42 × 42 = 35280 cm³

b) volume in m³ = 0.2 × 0.42 × 0.42 = 0.03528 m³

c) volume in ml³ = 200 × 420 × 420 = 35280000 ml³

d) volume in litres = 0.02 × 0.042 × 0.042 = 0.00003528 l³

e) Density = Mass / Volume

Mass = Volume × density

= 0.00003528 × 1

= 0.00003528 × 1000

= 0.03528 grams

f) Mass in kilo gram = 0.00003528 kg

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.