Question

Complete the following

A.

Mass(kg)	Volume(m3)	Density(kg/m3)
350	175	………
………	190	4

B.

Density of metal	Density of water	Relative density
(kg/m3)	(kg/m3)
………	103	5
8.5 × 103	103	………

C.

Thrust (N)	Area (m2)	Pressure (N/m2)
………	0.04	20000
1500	500	………

Answer 1

A.

Mass(kg)	Volume(m3)	Density(kg/m3)
350	175	2
760	190	4

First part: Density = Mass/ volume

⇒ Density = 350/ 175 = 2 kg/m³

Second part: Density = Mass/ volume

⇒ Mass = Density × volume

⇒ Mass = 4 × 190 = 760 kg

B.

Density of metal	Density of water	Relative density
(kg/m3)	(kg/m3)
5 ×103	103	5
8.5 × 103	103	8.5

First part: Relative density = (Density of metal)/ (Density of water)

⇒ 5 = (Density of metal)/10³

⇒ (Density of metal) = 510³ kg/m³

Second part: Relative density = (Density of metal)/ (Density of water)

⇒ Relative density = (8.510³)/( 10³) = 8.5

C.

Thrust (N)	Area(m2)	Pressure(N/m2)
800	0.04	20000
1500	500	3

First part: Pressure = Thrust/area

⇒Thrust = Pressure × area

⇒Thrust = 20000 × 0.04 = 800 N

Second part: Pressure = Thrust/area

⇒ Pressure = 1500/500 = 3 N/m²