1929. Category: Multiple choices

As one goes far away from the Earth, the density of air
A.becomes bigger

B. becomes less
C. remains constant

D. increases twice.

1930. Category: Multiple choices

A ferry boat floats in seawater because its density is

  •  greater than that of water
  • smaller than that of water
  • the same as its weight 
  • greater than its weight.
2286. Category: Multiple choices

When a body floats in a liquid:
A. its weight is less than the upthrust on it
B. its weight is greater than the upthrust on it
C. its weight is equal to the upthrust on it
D. its volume is equal to the volume of liquid displaced.

2287. Category: Multiple choices

When a body floats in water:
A. It displaces its own volume of water.
B. The mass of the water displaced by the body is equal to its own mass
C. It weighs the same as in air
D. The downthrust is more than the upthrust.

2289. Category: Short answers

Differentiate between the real weight and apparent weight of an object as applied
in Physics

2290. Category: Short answers

A solid weighs 64 N in air and 48 N when totally immersed in a liquid of denisty
0.8 g/cm 3 .Calculate:
(i) The upthrust on the solid.
(ii) The volume of the solid.
(iii) The density of the solid.

2291. Category: Short answers

A body which sinks in water has its density:
A. Less than that of water.
B. Larger than that of water.
C. Equal to that of water.
D. Less or equal to that of water.

2292. Category: Short answers

A piece of metal of volume 0.24 cm3 and mass 0.72 g has a relative density (R.D.) of:
A. 3.0 g/cm3.
B. 3.0.
C. 3.0 kg/m3.
D. 0.3.

2293. Category: Multiple choices

Archimedes’ Principle states that:
A. The upthrust experienced by a body when partially or totally
immersed in a fluid is equal to the weight of the fluid displaced.
B. Upthrust is equal to apparent loss in weight when a body is
partially or totally immersed in a fluid.
C. When a body is totally or partially immersed in a fluid it displaces its own weight of the fluid in which it is immersed.
D. When a body is partially or totally immersed in a fluid, it experiences a big loss in weight.

2294. Category: Multiple choices

The SI unit of density is
A. kg/m3.
B. kg/m2.
C. g/m3.
D. g/m2.

Notes Related to Archimedes principle and law of flotation questions.
The concept of up thrust
The Archimedes Principle
To apply the Archimedes Principle to determine relative density
To distinguish floating and sinking of objects
The conditions for a substance to float in fluids
Relate upthrust and weight of floating body
The law of flotation
Application of the law of flotation in everyday life
The mode of action of a hydrometer
To construct a simple hydrometer
To use hydrometer to determine the relative density of different liquids
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