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Pedia Tutorial offers tuition classes for English Medium students in CBSE, ICSE, ISC, IGCSE & West Bengal Board through online & offline mode. 1 on 1 individual coaching is also provided.

15/01/2021

𝐒𝐨𝐮𝐧𝐝

Believe it or not, there is no sound in space because there are no molecules there. Sound cannot travel through space since there are no molecules to travel through. Here on Earth, we have air molecules which vibrate to our ears.

Sound travels slower through the air than by water. In fact, the speed of sound via water is 4.3 times faster than by air. However, sound does travel far faster through steel than both air and water.

15/01/2021

𝐏𝐥𝐚𝐬𝐭𝐢𝐜𝐬

The term “plastics” includes materials composed of various elements such as carbon, hydrogen, oxygen, nitrogen, chlorine, and sulfur. Plastics typically have high molecular weight. Plastics, also called polymers, are produced by the conversion of natural products or by the synthesis from primary chemicals generally coming from oil, natural gas, or coal.

𝐒𝐨𝐦𝐞 𝐈𝐧𝐭𝐞𝐫𝐞𝐬𝐭𝐢𝐧𝐠 𝐅𝐚𝐜𝐭𝐬

• It takes about 450 years just for one plastic bottle to break down in the ground!

• 11% of household waste is plastic, 40% of which is plastic bottles.

• An estimated 13 billion plastic bottles are disposed of each year.

• 4 billion pounds of trash thrown into the ocean kill as many as 1 million sea creatures every year.

• Recycling plastic saves twice as much energy than burning it in an incinerator.

• 1 tonne = 25,000 plastic bottles. Recycling 1 tonne of plastic bottles saves 1.5 tonne of carbon.

• 25 recycled PET bottles can be used to make an adult's fleece jacket.

• Last but not least but certainly the most shocking is that nearly every piece of plastic EVER made still exists today.

15/01/2021

𝐈𝐧𝐭𝐞𝐫𝐞𝐬𝐭𝐢𝐧𝐠 𝐅𝐚𝐜𝐭𝐬 𝐚𝐛𝐨𝐮𝐭 𝐌𝐢𝐭𝐨𝐜𝐡𝐨𝐧𝐝𝐫𝐢𝐚

• They can quickly change shape and move around the cell when needed.
• When the cell needs more energy, the mitochondria can reproduce by growing larger and then dividing. If the cell needs less energy, some mitochondria will die or become inactive.
• Mitochondria are very similar to some bacteria. For this reason, some scientists think that they originally were bacteria that were absorbed by more complex cells.
• Different mitochondria produce different proteins. Some mitochondria can produce hundreds of different proteins used for various functions.
• In addition to energy in the form of ATP, they also produce small amounts of carbon dioxide.

15/01/2021

𝐏𝐞𝐝𝐢𝐚 𝐓𝐮𝐭𝐨𝐫𝐢𝐚𝐥 offering 𝐨𝐧𝐥𝐢𝐧𝐞 & 𝐜𝐥𝐚𝐬𝐬𝐫𝐨𝐨𝐦-𝐛𝐚𝐬𝐞𝐝 𝐭𝐮𝐢𝐭𝐢𝐨𝐧 𝐜𝐥𝐚𝐬𝐬𝐞𝐬 for 𝐄𝐧𝐠𝐥𝐢𝐬𝐡 𝐦𝐞𝐝𝐢𝐮𝐦 𝐬𝐭𝐮𝐝𝐞𝐧𝐭𝐬 across all boards.

𝐂𝐚𝐥𝐥 𝐭𝐨𝐝𝐚𝐲 +𝟗𝟏-𝟖𝟎𝟏𝟑𝟖-𝟐𝟗𝟕𝟖𝟏 𝐟𝐨𝐫 𝐚𝐝𝐦𝐢𝐬𝐬𝐢𝐨𝐧. Session Starts from 1st April '21

13/01/2021

𝐔𝐧𝐝𝐞𝐫𝐬𝐭𝐚𝐧𝐝𝐢𝐧𝐠 𝐩𝐨𝐭𝐞𝐧𝐭𝐢𝐚𝐥 & 𝐤𝐢𝐧𝐞𝐭𝐢𝐜 𝐞𝐧𝐞𝐫𝐠𝐲 𝐰𝐢𝐭𝐡 𝐚 𝐫𝐨𝐥𝐥𝐞𝐫 𝐜𝐨𝐚𝐬𝐭𝐞𝐫

As the car travels up the coaster it is gaining potential energy. It has the most potential energy at the top of the coaster. As the car travels down the coaster, it gains speed and kinetic energy. At the same time, it is gaining kinetic energy, it is losing potential energy. At the bottom of the coaster, the car has the most speed and the most kinetic energy, but also the least potential energy.

13/01/2021

Believe it or not...
A 𝐑𝐔𝐁𝐁𝐄𝐑 𝐓𝐘𝐑𝐄 is technically 𝐨𝐧𝐞 𝐬𝐢𝐧𝐠𝐥𝐞, 𝐠𝐢𝐚𝐧𝐭, 𝐩𝐨𝐥𝐲𝐦𝐞𝐫𝐢𝐳𝐞𝐝 𝐦𝐨𝐥𝐞𝐜𝐮𝐥𝐞.

Some molecules can be very big, but most are still microscopic. Not the vulcanized tire, though — it’s all one, big, molecule!

Basically, the vulcanized tire is all made of large polymers chains that have been crosslinked together with covalent bonds.

13/01/2021

𝐓𝐚𝐫𝐝𝐢𝐠𝐫𝐚𝐝𝐞𝐬 - 𝐭𝐡𝐞 𝐦𝐢𝐜𝐫𝐨𝐬𝐜𝐨𝐩𝐢𝐜 𝐧𝐞𝐚𝐫-𝐢𝐦𝐦𝐨𝐫𝐭𝐚𝐥 𝐰𝐚𝐭𝐞𝐫 𝐛𝐞𝐚𝐫𝐬

They can range from 0.05 millimeters to 1.2 mm (0.002 to 0.05 inches) long, but they usually don't get any bigger than 1 mm (0.04 inches) long. But they are very very hard to kill, almost 𝐢𝐦𝐦𝐨𝐫𝐭𝐚𝐥𝐬.

• Research has found that tardigrades can 𝐰𝐢𝐭𝐡𝐬𝐭𝐚𝐧𝐝 𝐞𝐧𝐯𝐢𝐫𝐨𝐧𝐦𝐞𝐧𝐭𝐬 𝐚𝐬 𝐜𝐨𝐥𝐝 𝐚𝐬 -𝟐𝟎𝟎° 𝐂 𝐨𝐫 𝐡𝐢𝐠𝐡𝐬 𝐨𝐟 𝐦𝐨𝐫𝐞 𝐭𝐡𝐚𝐧 𝟏𝟒𝟖.𝟗° 𝐂.

• 𝐓𝐡𝐞𝐲 𝐜𝐚𝐧 𝐬𝐮𝐫𝐯𝐢𝐯𝐞 𝐫𝐚𝐝𝐢𝐚𝐭𝐢𝐨𝐧, 𝐛𝐨𝐢𝐥𝐢𝐧𝐠 𝐥𝐢𝐪𝐮𝐢𝐝𝐬, 𝐦𝐚𝐬𝐬𝐢𝐯𝐞 𝐚𝐦𝐨𝐮𝐧𝐭𝐬 𝐨𝐟 𝐩𝐫𝐞𝐬𝐬𝐮𝐫𝐞 of up to six times the pressure of the deepest part of the ocean

• 𝐓𝐡𝐞𝐲 𝐜𝐚𝐧 𝐬𝐮𝐫𝐯𝐢𝐯𝐞 𝐞𝐯𝐞𝐧 𝐢𝐧 𝐭𝐡𝐞 𝐯𝐚𝐜𝐮𝐮𝐦 𝐨𝐟 𝐬𝐩𝐚𝐜𝐞 without any protection.

• Some species of tardigrade could 𝐬𝐮𝐫𝐯𝐢𝐯𝐞 𝟏𝟎 𝐝𝐚𝐲𝐬 𝐚𝐭 𝐥𝐨𝐰 𝐄𝐚𝐫𝐭𝐡 𝐨𝐫𝐛𝐢𝐭 while being exposed to a space vacuum and radiation.

10/01/2021

𝐃𝐢𝐝 𝐲𝐨𝐮 𝐤𝐧𝐨𝐰 𝐦𝐚𝐠𝐧𝐞𝐭𝐢𝐬𝐦 𝐢𝐬 𝐣𝐮𝐬𝐭 𝐥𝐢𝐠𝐡𝐭?

Why do you think magnets stick? Magnets attract each other because they exchange photons or the particles that makeup light. But unlike the photons streaming out of a desk lamp or reflecting off of everything you see around you, these photons are virtual, and your eyes (or any particle detector) can't "see" them. They can, however, exchange momentum, and this is why they stick to things or repel them. When a kid throws a dodge ball, they're exchanging momentum with the ball, and the thrower feels a slight push back. Meanwhile, the target person feels the force of the ball, and (maybe) gets knocked over — they are "repelled" from the thrower. With photons, the process can also happen in reverse, as though one kid reached out and grabbed the ball while the other was still hanging on to it, which would look like an attractive force.

Photons are the force carriers not only for magnets but also for electrostatic phenomena like static electricity, and it's why electromagnetism is the term we use for effects produced by these phenomena – including light, which is an electromagnetic wave.

10/01/2021

𝐃𝐫𝐲 𝐈𝐜𝐞

Dry ice, sometimes called "cardice," is solid carbon dioxide.

It is extremely cold (-109.3°F or -78.5°C). At this temperature, dry ice sublimates from a solid-state into a gaseous-state or undergoes deposition from gas to solid. It must be placed in a high-pressure environment in order to form liquid carbon dioxide.

It is very important to be careful when handling dry ice.

► 𝐃𝐫𝐲 𝐈𝐜𝐞 𝐒𝐚𝐟𝐞𝐭𝐲 𝐫𝐮𝐥𝐞𝐬

• Contact with dry ice can result in frostbite and cold burns. Avoid allowing any direct contact between dry ice and the skin, eyes, or mouth.

• Always use properly insulated gloves when handling dry ice.
Always use dry ice in a well-ventilated area. Although dry ice and carbon dioxide are nontoxic, since it can sink and displace air near the ground the use of dry ice may present a respiratory hazard. Also, when it mixes with the air, there's more carbon dioxide (less oxygen) in each breath.

• Do not eat or swallow dry ice.

• Never seal dry ice in glass jars or other closed containers. The pressure buildup may result in breakage or bursting.

10/01/2021

14 facts you should know about Blood Groups-

(y) Fact-No-1
A newborn baby has only one cup of blood in the whole body, whereas, the healthy adult has about 1.3 to 1.6 gallons or 4.0 to 5.0 litres of blood circulating inside their body

(y) Fact-No-2
Blood type influences one’s personality, which can also affect your fertility and belly fat. Women with blood type O are more likely to deal with fertility issues.

(y) Fact-No-3
The Red blood cells that do not contain either A or B antigens on their surface are normally found in the person with blood type O.

(y) Fact-No-4
Anybody with good health, healthy weight and around the age of 17 years old can donate blood every 3 to 4 months.

(y) Fact-No-5
More than 4.5 million lives are saved every year by blood transfusion.

(y) Fact-No-6
No one can get AIDS or any other infectious disease by donating blood and donating blood takes less than 15 minutes.

(y) Fact-No-7
Human blood has no other substitute and it makes 7 to 8 per cent of total body weight.

(y) Fact-No-8
Transfusion with a blood group different from yours can lead to complications.

(y) Fact-No-9
In ABO blood type, a transfusion of AB blood group can be given to a person who has blood type A, B and AB.

(y) Fact-No-10
AB blood type is known to be the “universal recipient” because AB+ people can accept blood from any other blood type. AB- is the least common blood type, which is less than 1% of the population. An individual with AB- blood type can receive blood from all three negative blood types.

(y) Fact-No-11
O blood type is called to be the “universal donor” because O+ is the most frequently occurring blood group in the ABO type. About 37 to 40 per cent of the entire population are found with this blood type. O- is the rare blood group as it is found in 6 to 7 per cent of the total population.

(y) Fact-No-12
A+ is the third most frequently occurring blood type in the ABO system. Thirty of every hundred people have A+ blood type. A- is the rare blood type, which is less than 10 to 15 per cent of the population has this blood type.

(y) Fact-No-13
Both B+ and B- are rare blood types and less than 10 per cent of the population has this blood type.

(y) Fact-No-14
Like hair colour, texture, and eye colour, blood type is also inherited or passed genetically from our parents. Therefore, our blood group is based on the blood types of either mother or father.

(y)

09/01/2021

Simplifying Newton’s law of motion
• The first law of motion states that: an object at rest will stay at rest. An object in motion stays in motion unless acted upon by an unbalanced force. Your soccer ball won’t move unless you kick it. Once it’s flying through the air, it will continue flying through the air unless it is slowed down by air resistance, gravity’s pull (it falls to the ground), or your foot or body making contact with it.
• The second law of motion states that: Acceleration occurs when a force acts on mass. The greater the mass, the more force is needed to cause acceleration. The harder you kick the soccer ball, the faster it flies (accelerates). The larger the soccer ball, the harder you must kick.
• The third law of motion states that: for every action, there is an equal and opposite reaction. When you kick your soccer ball, it goes flying. As your foot comes back down, your body feels the force of the kick. You must move to keep your balance.

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