Question

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Answer 1

Answer:

5) option a

Explanation:

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Answer 2

4. Which principal helped the officers to save the elephant ? Explain how the principal helped .

☆Answer☆

Archimedes principle or the ‘upward buoyant force theory’ helped the officers to save the elephant .

In physics, the Archimedes Principle refers to the law of buoyancy (the ability or tendency of something to float in water or other fluids).

According to the principle, when an object is completely or partially submerged in a fluid, whether gas or liquid, it is acted upon by an upward force (buoyancy) equal to the weight of the fluid it has displaced.

If the buoyant force is more than the weight, the object rises; if it is less, the object sinks. If the net force is zero, the object remains in place, and neither rises nor sinks.

In the case of the elephant rescued in Jharkhand, the rescue team filled the well with water using motorised pipes, after which the struggling elephant floated to the top and was able to climb out through a ramp placed for it.

5. The percentage of an iceberg (freshwater of density 0.92 g/cm^3) below the waterline in an ocean ( saltwater of density 1.025 g/cm^3 ) will be approximately .

☆Answer☆

Option (d) 10%

V be the volume of the iceberg, x be the volume out of seawater.

V be the volume of the iceberg, x be the volume out of seawater.The iceberg is floating in sea water then

V×0.92×g=(V−x)1.025g

or 0.9V= 1.025V - 1.025x

1.025x = 1.025V - 0.92V

1.025x = 0.105V

x/V= 0.105/1.025

The percentage of an iceberg below the waterline in an ocean

x/v × 100 = 0.105 /1.025×100

0.10 × 100 = 10%