Explanation

As we all know

Circumference of the circle: 2πr

The radius of the circle: r

Ratio = 2πr : r = 2πr/r = 2π

Thus we conclude that 2π:1

Explanation

Most abundant element in Earth crust is Oxygen.

Oxygen in the crust is (46.1%).

The chemical formula of oxygen (dioxygen) is O2.

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List of 10 Most Abundant Elements in the Earth's Crust

Explanation

Heavy water, also known as Deuterium Oxide (D₂O).

It is used as a neutron moderator in nuclear reactors.

Due to its ability to slow down neutrons without absorbing them.

Explanation

Explanation

To find the total number of packages:

Total weight of meat = 100 kg

Weight of each package = 4/7 kg

Number of packages = Total weight / Weight per package

= 100 / (4/7)

= 100 * 7 / 4

= 175

Explanation

Given:

Zˣ = 32

Since 32 is a power of 2:

32 = 2⁵

So, Zˣ = 2⁵

Now, equate the exponents:

X = 5

Now, find X²:

X² = 5² = 25

Explanation

اردو نثر میں علامہ اقبال کی پہلی باقاعدہ تصنیف کا نام علم الاقتصاد ہے۔

Explanation

Explanation

To find the commission percentage:

Commission = Rs. 25

Sales = Rs. 250

Commission percentage = (Commission / Sales) × 100

= (25 / 250) × 100

= 10%

Explanation

An anemometer is an instrument that measures wind speed.

This type of anemometer has a spinning wheel.

Additional Information:

A hygrometer is an instrument used to measure humidity

A salinometer is used to measure the salinity

A bolometer is used to measure the power of incident electromagnetic radiation

A barometer is used to measure air pressure in certain environment.