Explanation

A force is a push or pull upon an object resulting from the object's interaction with another object.

Whenever there is an interaction between two objects, there is a force upon each of the objects.

Explanation

The heart is a muscular organ about the size of a fist, located just behind and slightly left of the breastbone.

The heart pumps blood through the network of arteries and veins called the cardiovascular system.

Explanation

There are four stages in coal formation: peat, lignite, bituminous, and anthracite. 

Explanation

4 Men and 6 Women take 8 days. So TOTAL WORK = 32 MD + 48 WD

 (where MD= Mandays, & WD = Womandays, a unit of work) ……(eqn1)

3 Men and 7 Women take 10 days. So, TOTAL WORK = 30 MD + 70 WD …. (eqn2)

Equating the total work,

32 MD + 48 WD = 30 MD + 70 WD

=> 2 MD = 22 WD

=> 1 MD = 11 WD

So, replacing man days in eqn2,

TOTAL WORK = 400 WD

Now, 10 women will complete 10 WD of work in one day.

To complete 400 WD of work,

Time needed = (400 WD)/(10 WD) = 40 Days

Explanation

e.g. is the abbreviation for the Latin phrase exempli gratia, meaning “for example.” 

e.g. means مثال کے طور پہ

Explanation

1,000,000,000 is the natural number following 999,999,999 and preceding 1,000,000,001.

One billion can also be written as b or bn.

In standard form, it is written as 1 × 10⁹.

Explanation

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Explanation

Plaster of Paris is made by heating the mineral gypsum. When gypsum is heated to about 150°C it losses water and produces the powder of plaster of Paris.

Explanation

In 1980, the World Health Organization announced the global eradication of smallpox.

It is the only human disease to be eradicated worldwide.

Explanation

MRI, and the detailed images it produces, has been a huge benefit for the study of the brain.

Its greatest innovation is allowing us to see which parts of the brain have been damaged while a patient is still alive.