🤔 How it works …….. ⁉
HOW A MICROPHONE WORKS
A microphone converts sound into a small electrical current. Sound waves hit a diaphragm that vibrates, moving a magnet near a coil. In some designs, the coil moves within a magnet.
Other microphones, such as condenser microphones, work on the principle of capacitance. Capacitors consist of parallel conducting plates that store charge and are used to smooth out signals like voltage variations in a power supply. In a condenser microphone, the incoming sound vibrates one plate of a capacitor. The varying capacitance is converted into a corresponding electrical signal.
😳Why❓❓❓
Why is milk produced only after delivery, why not during pregnancy or before?
When a women become pregnant, progesterone and estrogen, hormones that are a part of normal menstrual cycle, rise dramatically, and a new hormone, called human chorionic gonadotropin, begins to be produced.
Although mammary growth begins during pregnancy under the influence of ovarian and placental hormones, and some milk is formed, copious milk secretion sets in only after delivery.
Since lactation ensues after a premature birth, it would appear that milk production is held back during pregnancy.
Sometimes a woman’s breasts make milk even though she is not pregnant or breastfeeding. This condition is called galactorrhea (say: guh-lack-tuh-ree-ah).
The milk may come from one or both breasts. It may leak on its own or only when the breasts are touched.
Reasons for lactating when not recently pregnant can range from hormone imbalances to medication side effects to other health conditions. The most common cause of breast milk production is an elevation of a hormone produced in the brain called prolactin.
Women with certain illnesses and infections may be advised by doctors not to breastfeed because of the danger of passing the illness or infection to the breastfed infant.
💁🏻♂️ GK TODAY
The September 11 attacks, often referred to as 9/11, were a series of four coordinated terrorist attacks by the militant Islamist terrorist group al-Qaeda against the United States of America on the morning of Tuesday, September 11, 2001.
WHAT HAPPENED ON THAT DAY
On September 11, 2001, 19 militants associated with the Islamic extremist group al Qaeda hijacked four airplanes and carried out suicide attacks against targets in the United States.
Two of the planes were flown into the twin towers of the World Trade Center in New York City, a third plane hit the Pentagon just outside Washington, D.C., and the fourth plane crashed in a field in Shanksville, Pennsylvania.
Almost 3,000 people were killed during the 9/11 terrorist attacks, which triggered major U.S. initiatives to combat terrorism and defined the presidency of George W. Bush.
IMPORTANT DAY 😳
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11 September – National Forest Martyrs Day
The date 11 September has historical significance and due to this, the date was chosen as National Forest Martyrs Day. In 1730, on this day, over 360 people of the Bishnoi tribe led by Amrita Devi, objected to the felling of trees. Due to their protest of saving the trees, they were killed in Khejarli, Rajasthan on the orders of the king.
BORN TODAY 🐣💐
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Vinayak Narahari “Vinoba” Bhave (11 Sep1895 – 15 Nov 1982) was an Indian advocate of nonviolence and human rights.
Often called Acharya (Sanskrit for teacher), he is best known for the Bhoodan Movement.
He is considered as a National Teacher of India and the spiritual successor of Mohandas Gandhi.
The Gita has also been translated into Marathi language by him with the name as Geetai means mother Geeta.
IDIOMS & PHRASES
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KILL TWO BIRDS WITH ONE STONE
Accomplish two things with the same effort
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Ch Narmada Naveen Kumar |
