Question

The lengths of the diagonals of of a parallelogram are 10√3 cm and 10√2 cm. If one side of the parallelogram is 13 cm, find the perimeter of the parallelogram.​

Answer 1

Answer:

44CM.

Step-by-step explanation:

According to the parallelogram law, sum of the squares of the sides equals the sum of the squares of its diagonals, i.e., for a parallelogram ABCD shown below,

∵ AB = CD and BC = AD, we get,

⇒ 2(AB)2 + 2(BC)2 = (AC)2 + (BD)2

Let the length of the other side of the parallelogram be ‘x’ cm

Hence, for the given parallelogram, we can write,

⇒ 2(13)2 + 2(x)2 = (10√3)2 + (10√2)2

⇒ 338 + 2x2 = 300 + 200

⇒ 2x2 = 500 – 338 = 162

⇒ x2 = 162/2 = 81

⇒ x = 9 cm

∴ Perimeter of the parallelogram = 2(13 + 9) = 44 cm

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Answer 2

Answer:

"Types of Ozone Layers

Written by 

Jayprakash Suvasia 

There are 2 types of ozone layers: the stratospheric ozone layer and the tropospheric ozone layer. The stratospheric ozone layer is found in the Earth's atmosphere, located 10 to 50 km above Earth's surface and is not affected by chemical reactions. This ozone layer absorbs most UV radiation before it can reach ground level. On the other hand, tropospheric ozones are created when air molecules react with hydrocarbons and nitrous oxides in order to create new oxygen molecules. Tropospheric ozone is not harmful to humans but is harmful to vegetation.

Stratospheric Ozone Layer

The stratospheric ozone layer is located in the Earth's atmosphere, around 10 to 50 km above the ground level. This layer of ozone filters out ultraviolet radiation that can result in skin cancer and can damage growing crops. It also protects animals by filtering out UV rays that could otherwise cause harm. The ozone layer absorbs about 97% of the sun's UV rays, thus creating a very effective barrier against organic systems. However, the ozone layer is now being destroyed by gases that are released into the atmosphere, such as chlorofluorocarbons (CFCs).

The ozone layer is known to be fragile because its formation is affected by the number of chlorine atoms in its molecules. As more chlorine atoms are added to the molecules, more ozone can be created. As a result, increasing CFCs in the atmosphere has contributed to increased production of Ozone depletion.

The troposphere is a region of Earth's atmosphere where atmospheric pressure is usually a few hundred millibars and temperatures hover between 0 to 35 °C. Ultraviolet radiation from the Sun reaches this layer every day, which catalyses the destruction of ozone molecules. The destruction of these molecules creates oxygen radicals, which produces Ozone Atoms (O3). Ozone Atoms are not harmful to humans so long as they are not too much in number."