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.