Question

Question 1

The pressure in a liquid is:

A)	independent of the depth

B)	linearly proportional to the depth

C)	proportional to the 3rd power of depth

D)	inversely proportional to the depth

E)	proportional to the 2nd power of depth

Question 2

The reason for floating of some objects in water is due to:

A)	First law of thermodynamics.

B)	Archimedes’ principle.

C)	Hydrogen bond.

D)	Einstein Energy principle.

E)	Earth magnetic poles.

Question 3

The reason for Titanic catastrophe was that they didn’t pay attention to the:

A)	poor technology of the engines.

B)	density of water sea.

C)	heat created in the fast speed.

D)	volume ratio of the ice underneath and the ice outside of the water surface.

E)	number of passengers.

Question 4

A cube that is 3.0 cm on a side is made from a material with a density of 800 Kg/m³. the cube floats in a fluid that has a density of 1200 Kg/m³. How much of the height of the cube is underneath the surface of the fluid?

A)

0.5 cm

B)

1.0 cm.

C)

1.5 cm.

D)

2.0 cm.

E)

2.5 cm.

Answer 1

1) Option B) is correct

Liquid pressure is the increase in pressure at increasing depths in a liquid.

2) Option B) is correct

Archimedes' principle states that the upward buoyant force that is exerted on a body immersed in a fluid, whether fully or partially submerged, is equal to the weight of the fluid that the body displaces and acts in the upward direction at the center of mass of the displaced fluid.

3) Option D) is correct

volume ratio of the ice underneath and the ice outside of the water surface.

4) Option D) is correct

(800/1200) x 3cm = 2cm.