Yukthi academy

07/03/2015

Todays Thought
Why do we cry when we chop an onion?

When you cut an onion, it releases a gas called, ready for this, Propanethiol S-oxide. When mixed with certain enzymes in the onion, it creates a sulfur gas. These gases then get to your eyes and create a mild acid which irritates the eyes.

26/02/2015

Todays Thought:

What is Gravity??

Gravity is a force pulling together all matter (which is anything you can physically touch). The more matter, the more gravity, so things that have a lot of matter such as planets and moons and stars pull more strongly.

Mass is how we measure the amount of matter in something. The more massive something is, the more of a gravitational pull it exerts. As we walk on the surface of the Earth, it pulls on us, and we pull back. But since the Earth is so much more massive than we are, the pull from us is not strong enough to move the Earth, while the pull from the Earth can make us fall flat on our faces.

In addition to depending on the amount of mass, gravity also depends on how far you are from something. This is why we are stuck to the surface of the Earth instead of being pulled off into the Sun, which has many more times the gravity of the Earth.

25/02/2015

Todays thought --2

Why water appears to be in blue colour?

The ocean looks blue because red, orange and yellow (long wavelength light) are absorbed more strongly by water than is blue (short wavelength light). So when white light from the sun enters the ocean, it is mostly the blue that gets returned. Same reason the sky is blue.....

Good Morning Have a Nice day...

24/02/2015

Todays thought: Albert Einstein

Albert Einstein was born on the 14th of March 1879 and died on the 18th of April 1955.

Born in Germany to a Jewish family, Einstein made many contributions to the field of theoretical physics.

Even when very young, Einstein showed great ability in both math’s and science. He was naturally curious and had a brilliant analytical mind.

Einstein worked in a patent office evaluating patents for electromagnetic devices not long after he graduated.

He produced perhaps one of the most famous equations ever: E = mc² (energy equals mass multiplied by the speed of light squared).

He is also well known for his theory of relativity. Special relativity being introduced in his 1905 paper “On the Electrodynamics of Moving Bodies” before Einstein developed the theory of general relativity between the years of 1907 and 1915.

Einstein won the 1921 Nobel Prize in Physics for his work on theoretical physics.

He worked on many other influential theories and projects including: the deflection of light by gravity, the quantum theory of atomic motion in solids, Brownian motion, an explanation for capillary action and much more.

Famous Albert Einstein quotes include: "Whether you can observe a thing or not depends on the theory which you use. It is the theory which decides what can be observed."

"If I were not a physicist, I would probably be a musician. I often think in music. I live my daydreams in music. I see my life in terms of music.... I do know that I get most joy in life out of my violin."

"Physical concepts are free creations of the human mind, and are not, however it may seem, uniquely determined by the external world."

"I am enough of an artist to draw freely upon my imagination. Imagination is more important than knowledge. Knowledge is limited. Imagination encircles the world."

24/02/2015

24/02/2015

BITSAT 2015 Paper Pattern:

BITSAT 2015 is a Computer Based Online Test.
Duration of BITSAT 2015 will be three hours with 150 multiple choice questions
The BITSAT 2015 Question Paper will be divided into four sections:.. First section in Physics with 40 questions...Second section in Chemistry with 40 questions...Third section consists of questions to test the candidate’s English Proficiency with 15 questions and Logical Reasoning with 10 questions
....Fourth section in Maths with 45 questions
Each correct answer will get three marks each
One mark will be deducted for each wrong answer.