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WISDOM LINK AMAZING FACTS OF BIOLOGY (LUNGS)

(1) Lungs are the major organ of the respiratory system. An average human breathes about 13pints of air every time.

(2) The right lung is bigger than the left lung.

(3) Lungs are the only organ in the human body that can float on water because it composed of tube-like structure called air sacs.

(4) Humans have two lungs and are situated within the thoracic cavity of the chest. Lungs are divided into a smaller structure called Bronchi which are divided into bronchioles.

(5) The lungs capacity of a healthy man is estimated to be 6000ml. The total lungs capacity refers to the total volume of air filled in the lungs.

(6) Inhaling through the nose and exhaling through the mouth disturbs the level of oxygen and carbon (iv) oxide balance in the lungs.

(7) Among all infectious diseases, asthma is one of the most common and dreadful disease that affect the lungs

(8) In breathing, inhalation is much more stronger than exhalation. As we breathe in, the air gets filtered by the nasal chambers which is followed by the nose.

(9) Yawning helps us to breathe more oxygen into our lungs. It's an involuntary process accompanied by long inhalation. This process occur when the brain cells send a message as it's sense the shortage of oxygen and the message tricks our sensory system to take a long deep breathe.

(10) The respiratory quotient is define as the ratio of volume of oxygen consumed and volume of carbon (iv) oxide eliminated during cellular respiration. The normal respiratory quotient (RQ) is 0.7 to 1.0

*AMAZING CHEMISTRY FACTS FROM WISDOM LINK TUTORIAL*

*(1)* The only solid elements that assume liquid form ​at room temperature are bromine and mercury. However, you can melt gallium by holding a lump in the warmth of your hand.

*(2)* Unlike many substances, water expands as it freezes. An ice cube takes up about 9% more volume than the water used to make it.

*(3)* If you pour a handful of salt into a full glass of water, the water level will actually go down rather than overflowing the glass.

*(4)* Similarly, if you mix half a liter of alcohol and half a liter of water, the total volume of the liquid will be less than one liter.

*(5)* There is about 0.4 pound or 200 grams of salt (NaCl) in the average adult human body.

*(6)* A pure element takes many forms. For example, diamond and graphite both are forms of pure carbon.

*(7)* Many radioactive elements actually glow in the dark.

*(8)* The chemical name for water (H2O) is dihydrogen monoxide.

*(9)* The only letter not appearing on the periodic table is J.

*(10)* Lightning strikes produce O3, which is ozone, and strengthen the ozone layer of the atmosphere.

*(11)* The only two non-silvery metals are gold and copper.

*WISDOMLINK MATHEMATICAL TRICKS*

*(1)* Suppose we need to find the square root of large numbers such as 4489 without the use of calculator

Step 1: The unit digit in this number is 9, which can be a unit digit of its square root number such as 3 or 7. Because 32 is 9 and 72 is 49.

Step 2: Now let us consider the first two digits that is 44 which comes between the squares of 6 and 7 because 62 < 44< 72

Step 3: We can assume that the ten’s digit of the square root of 4489 is the lowest among the two numbers i.e. 6 and we need to find the unit digit of the square root of the number 4489.

Step 4: Now, we need to find between 63 or 67 which is the square root of 4489.

Step 5: Since the ten’s digit is 6 and the next number is 7, we need to multiply both the numbers like 6 x 7 = 42 and since 42 is less than 44.

Step 6: Square root of 4489 will be the bigger number between 63 and 67 i.e. 67.

Therefore, √4489 = 67

*(2)* When counting a percentage value (e.g 40% of 300). Divide both side by 10 and multiply the result

(4 x 30)= 120

*(3)* To multiply 9 by 5, fold down the fifth finger from the left. Count fingers on either side of the "fold" to get the answer. In this case, the answer is 45.

To multiply 9 times 6, fold down the sixth finger, giving an answer of 54.

*(4)* The 11 Rule
This is a quick way to multiply two-digit numbers by 11 in your head.

Separate the two digits in your mind.
Add the two digits together.
Place the number from Step 2 between the two digits. If the number from Step 2 is greater than 9, put the one's digit in the space and carry the ten's digit.
Examples: 72 x 11 = 792.

57 x 11 = 5 _ 7, but 5 + 7 = 12, so put 2 in the space and add the 1 to the 5 to get 627.

*(5)* If you multiply 6 by an even number, the answer will end with the same digit. The number in the ten's place will be half of the number in the one's place.

Example: 6 x 4 = 24.