NCERT NOTES

2021-06-16 11:12:17 How were the Himalayan ranges formed?

The Himalayan mountain range and Tibetan plateau have formed as a result of the collision between the Indian Plate and Eurasian Plate which began 50 million years ago and continues today.

225 million years ago  India was a large island situated off the Australian coast and separated from Asia by the Tethys Ocean.

The Indo-Australian tectonic plate collided with the Euroasian plate after many hundreds of millions of years of slow migration, forcing the land up and forming the area that is now India pushed against Tibet.

This created the massive mountain fold that is known as the Himalayas, some of the tallest mountains in the world. The mountain range extends for more than 1,500 miles, with the highest peak, Mount Everest, rising 29,029 feet above sea level.

Tectonic plates are located in the earth's lithosphere. These plates move at different rates through a process of convection.

In the Earth's inner mantle - which is directly below the lithosphere - molten rock forms and pushes hot gas and liquid upward.

The hot materials displace cooler gases and liquids and create convection currents that push the tectonic plates. Due to the continued plate movement, the Himalaya region also experiences many earthquakes.

Some of these earthquakes are some of the most destructive natural disasters on record. Open / Comment

2021-06-16 11:12:11 Open / Comment

2021-06-15 15:08:46 5 Daily Reminders

1. You can not change the past.

2. Others' opinions do not define your reality.

3. Positive thoughts cultivate positive actions.

4. Overthinking a problem will not solve the problem.

5. You can not make everyone happy.

Open / Comment

2021-06-15 15:08:01 LIST OF FESTIVALS OF INDIA :

1. Andhra Pradesh - Dasara, Ugadi, Deccan Festival, Brahmotsavam

2. Arunachal Pradesh - Reh, Boori Boot, Myoko, Dree, Pongtu, Losar, Murung, Solang, Mopin, Monpa festival

3. Assam - Ambubachi, Bhogali Bihu, Baishagu, Dehing Patkai

4. Bihar - Chhath Puja, Bihula

5. Goa - Sunburn festival, Ladain, Mando

6. Gujarat - Navratri, Janmashtami, Kutch Utsav, Uttarayana

7. Himachal Pradesh - Rakhadumni, Gochi Festival

8. Jammu and Kashmir - Har Navami, Chhari, Bahu Mela, Dosmoche,

9. Jharkhand - Karam Utsav, Holi, Rohini, Tusu.

10. Karnataka - Mysore Dasara, Ugadi

11. Kerala - Onam, Vishu

12. Meghalaya - Nongkrem festival, Khasis festival, Wangla, Sajibu Cheiraoba

13. Maharashtra - Ganesh Utsav, Gudi Padva

14. Manipur - Yaoshang, Porag, Chavang Kut

15. Mizoram - Chapcharkut Festival.

16. Nagaland - Hornbill festival, Moatsu Festival

17. Odisha - Rath Yatra, Raja Parba, Nukahai

18. Punjab - Lohri, Baisakhi

19. Sikkim - Losar, Saga Dawa

20. Telangana - Bonalu, Bathukamma

21. Tripura - Kharchi Puja

22. West Bengal - Durga Puja

23. Uttarakhand - Bhitauli, Harela, Phool Dei, Ganga Dusshera

24. Uttar Pradesh - Ram Navmi, Ganga Mahotsav, Navaratri, Khichdi

25. Tamil Nadu - Pongal, Thaipusam, Natyanjali Festival

26. Madhya Pradesh - Lok-rang Utsav, Tejaji, Khujaraho festival

27. Chhattisgarh - Maghi Purnima, Bastar Dussehra

28. Rajasthan - Gangaur, Teej, Bundi Open / Comment

2021-06-15 06:36:58 How do icebergs lose their salt?

Icebergs do not have any salt to begin with. Icebergs are not pieces of frozen ocean water. Rather, icebergs are frozen chunks of fresh water that began their life on land. It all starts when snow falls in a region of land that is too cold for the snow to melt.

Over time, the non-salty snow builds up on the ground. Without temperatures warm enough to melt the snow, it piles up so high that it starts to crush under its own weight. The crushing force of gravity fuses the non-salty snow crystals into a giant slab of non-salty ice known as a glacier. This process is very slow and takes a long time. Gravity not only pulls the snow down into the ice, it also pulls the ice downhill. Open / Comment

2021-06-14 13:52:54 Why Are Rain Clouds Dark?

It's pretty well-known that most clouds are white, while rain clouds are usually a darker shade of gray.

But why are rain clouds so dark?

Unlike atmospheric particles that scatter more blue light than other colors (making the sky blue), the tiny cloud particles equally scatter all colors of light, which together make up white light.

However, rain clouds are gray instead of white because of their thickness, or height. That is, a cloud gets thicker and denser as it gathers more water droplets and ice crystals the thicker it gets, the more light it scatters, resulting in less light penetrating all the way through it.

The particles on the underside of the rain cloud don't have a lot of light to scatter to your eyes, so the base appears gray as you look on from the ground below.

This effect becomes more pronounced the larger the water droplets get such as right before they're large enough to fall from the sky as rain or snow because they become more efficient at absorbing light, rather than scattering it. Open / Comment

2021-06-13 16:17:24 Even in the darkest of times, there is light.

Even in the darkest of times, there is light. I know many of you are experiencing great anxiety in this unsettling time. That is a very natural response to a situation that disrupts and uproots our everyday routine, plans, finances and potentially, our health and the health of our loved ones. It's ok to be anxious but remember to breathe and remember to love. Read that book you keep putting off, get outside and move, call a friend you haven't spoken with in a while, learn new things.

@PhysicsWallahJi Open / Comment

2021-06-12 12:30:01 Open / Comment

2021-06-11 05:45:45 ​​What is a Nebulizer, and How does it work?

If you have asthma, your doctor may prescribe a nebulizer as treatment or breathing therapy. The device delivers the same types of medication as metered-dose inhalers (MDIs), which are the familiar pocket-sized inhalers. Nebulizers may be easier to use than MDIs, especially for children who aren’t old enough to properly use inhalers, or adults with severe asthma.

A nebulizer turns liquid medicine into a mist to help treat your asthma. They come in electric or battery-run versions. They come in both a portable size you can carry with you and a larger size that’s meant to sit on a table and plug into a wall. Both are made up of a base that holds an air compressor, a small container for liquid medicine, and a tube that connects the air compressor to the medicine container. Above the medicine container is a mouthpiece or mask you used to inhale the mist.

Pressurized air passes through the tube and turns the liquid medicine into a mist. During an asthma attack or a respiratory infection, the mist may be easier to inhale than the spray from a pocket inhaler. When your airways become narrow like during an asthma attack, you can’t take deep breaths. For this reason, a nebulizer is a more effective way to deliver the medication than an inhaler, which requires you to take a deep breath. Open / Comment

2021-06-09 10:56:00 ​​What is a BiPAP Machine and How does it Work?

Bilevel positive airway pressure Machine (BiPAP) is a small ventilator, the size of a tiffin box.

It is used to provide ventilation to patients who are insufficiently breathing.

It is a non-invasive technique of ventilation provided by using either a nasal mask or a face mask.

Breathing is accomplished normally by the movement of the diaphragm, when breathing in the diaphragm moves down, resulting in a drop in pressure in the sacs of the lungs, allowing air to flow in and when breathing out the diaphragm rises increasing the pressure, and pushing the air out.

The BiPAP machine cycles between two levels of continuous positive airway pressure.

This means that the machine pumps air at two different pressures. This is diffrent from a continuous positive airway pressure machine (CPAP) which pumps air at only one pressure level.

The machine works by providing air at a higher pressure to facilitate inhalation and at a lower pressure to facilitate exhalation.

BiPAP Machines are used to treat patients suffering from respiratory failures in diseases such as Pneumonia, Pulmonary Edema and chronic obstructive pulmonary disease.

This mode of ventilation in adults has resulted in shorter duration of ventilation, less need for sedation, and fewer complications than intubation and positive pressure ventilation. Open / Comment