Bheja Fry Question

 Question 

A circle is perfectly inscribed inside a square. If the area of square is 64 cm '2, what is the area of circle ??

Answer 

We know the area of square as 64 cm2.

=>> Area of square = side2 = 64

==>> side = sqrt 64

==>>side  =  8  cm

Circle is perfectly inscriptions inside the square.

==>>  side of square  =  diameter of circle

==>>  8 cm

We know

 diameter of circle  =  2  × radius of circle

Radius  =   diameter  ÷ 2

Radius  =  8  ÷  2

Radius =  4 cm

Area of circle, 

                    π × radius^ 2

                    π ×  16

                    3.14  ×   16

                     50.24

Area of circle  =  50.24  cm2   !!! 

Why does day old rice gets dry in refrigerator ??

 We cook white rice in our house.  When it remains more than required, my mother seperates the remaining cooked rice in a bowl and keeps it inside the fridge.

Next day rice becomes dry and hard.. But it is very much suitable to prepare curd rice  !!!

We have it with pickle.

SCIENCE OF STALE RICE 

When we first cook rice, the starch granules absorb water and swell up, making them soft.

This is called GELATINIZATION.

When the rice cools in refrigerator, starch molecules start to realign themselves into a crystalline structure.

As they recrystallize, they effectively squeeze out the water once they held.

This makes the rice to feel dry if the rice is kept covered inside refrigerator.

Refrigerators pull the moisture out of the air to prevent frosting.. This further dehydrates rice.

Rain Shadow

  Rain shadow =  " dry side  " of mountain  !!!

To know, what is " dry side " of a  mountain, we must know what is " wet side " of a mountain.

1.  Wet side

              Wind blows from the ocean , hits a mountain.

              The air is forced up. As it goes up, it gets cold. And all the water in it, turns into rain  !!!

              So, this side of mountain gets lots of rain and is called " wet side  ".

2.  Dry side or Rain Shadow 

               After the air crosses the mountain top, it comes down on other side.

                Now the air is dry, as it has dumped all its water content on " other  " side  !!!!

                 So this side gets very little rain and it is known as " rain shadow  ".

Example 

                 Mountain  :  Western Ghats

                  Wet side  :  Mumbai

                  Rain Shadow  :  Solapur,  Bijapur 

              

Why are human babies so helpless ??

                    Human babies have big brains. But mothers have narrow hips as we walk on 2 legs.

So baby can't stay inside till the brain is fully grown.  

Baby has to come out early.

That's why human babies are born unfinished   !!!!

                         When human babies are born, their brain is only 25% done. The rest grows after birth.

For the first year, human babies need mom/dad for everything.

                          But other primates '  babies stay inside the body for longer time. When they are born, their brain is already more grown. So they can hold on, crawl and cling right away  !!!

So this difference make human babies so helpless because of unfinished brain   !!!

How do hospitals clean their laundry ?!

   Hospital linens are not average laundry load  !!

It can be exposed to bodily fluids, bacteria and pathogens during patient care.

If these textiles are not properly disinfected, they may contribute to the spread of hospital acquired infections.

HOW THE LAUNDRY IS CLEANED  ??

The machines operating in laundry work are operated in carefully calibrated thermal environment.

They use specific detergents and disinfectants to eliminate harmful bacteria and viruses.

Linens are washed at temperatures exceeding 70 degree Celsius for a period of time so that effective removal of pathogenic microorganisms are achieved.

Linens used in isolation ward and surgical ward are cleaned in different way than general ward linens.