Want to learn ‘Motion in a Plane’? Read this first

Learning ‘Motion in a Plane’ can get tough. A whole bunch of unfamiliar terms to deal with and no specific place where you can find all the answers. But don’t worry, we’ve laid down all the basics that you’ll need, stepwise, that will kick-start your learning process and help you all throughout the way to learn and master Motion in a Plane.

The first step is understanding Scalar and Vector Quantities

Vectors have magnitude and direction, scalars only have magnitude. The fact that magnitude occurs for both scalars and vectors can lead to some confusion. There are some quantities, like speed, which have very special definitions for scientists. By definition, speed is the scalar magnitude of a velocity vector.

For example, the speed and direction of a car, (a magnitude and a direction) together form a vector we call velocity.

Scalar quantities: mass has only a value, no direction. Electric charge has only a value, no direction.
A scalar quantity has only magnitude.

A vector quantity has both magnitude and direction.

 

Position and Displacement Vectors

Displacement is defined as the distance, in any direction, of an object relative to the position of another object. Physicists use the concept of a position vector as a graphical tool to visualize displacements. A position vector expresses the position of an object from the origin of a coordinate system.
A displacement is a vector that is the shortest […]

Announcing the Winners of Nanotechnology Challenge

A week full of insights into the world of Nanotechnology is finally over. All participating students took a deep dive into the Science of Small and tried learning everything there is to know about Nanotechnology.

Among hundreds of other students on Crawded, only these have managed to win the Challenge.

Here’s the list of all students who made it to the Top 10.

Congratulations Winners!

 

 
Key takeaways from the Challenge:

Nanotechnology was first introduced in 1959 by Nobel Prize winning Physicist Richard Feynman.
The lecture, “There’s Plenty of Room at the Bottom”, by Richard Feynman is held to have provided inspiration for the field of Nanotechnology.
Nanoscience is not just one science. It is a platform that includes Biology, Chemistry, Physics, Materials Science and Engineering.
Nanotechnology is already having an impact on novel foods, medical devices, chemical coatings, personal health testing kits, sensors for security systems, water purification units for manned space crafts, displays for hand-held computer games and high-resolution cinema screens.
It is already applied commercially in products ranging from mobile phones, computer discs, tennis rackets and golf club to sunscreens and cosmetics.L’Oreal have developed nanosize vesicles called nanosomes. They are used to transport active ingredients such as pure Vitamin E though the skin.

 

Crawded Challenges consist not only […]

Nanotechnology – The Science of Small

The term nanotechnology comes from the Greek word “nanos”, which means “dwarf”.

Nanotechnology is a collective term for a variety of innovations and developments whose common denominator is that they concern the investigation, production, and use of these very small structures. This makes nanotechnology a truly interdisciplinary technology. Many substances that have long been known and used have structures in the nanometer range; these include catalysts, fillers, and pigments.

Nanomaterials are by no means a recent discovery. These minute particles are also widely found in nature: Cell organelles and DNA, for example, have dimensions in the nanometer range as do natural pigments and diatomaceous earths.

Nanotechnology is the manipulation of matter at a molecular or atomic level in order to produce novel materials and devices with new extraordinary properties. It is closely related to Nanoscience, the basic theoretical and experimental study of matter at the nanoscale before applying the acquired knowledge for device manufacturing. However, nanotechnology is not a new discipline. It is rather the merging of multiple scientific disciplines (biology, physics, chemistry, medicine and engineering) and the combination of knowledge to tailor materials at the nanoscale; approximately in the range of 1-100 nanometers (10-9 m)
One Nanometer (nm) is one millionth of a millimeter. […]

Announcing Innovations and Inventions Challenge on Crawded

What is Innovations and Inventions Challenge?

Innovation – a new method, idea, product, etc.
Invention – something that did not exist previously and is not ordinary.
Now that you know WHAT IS INNOVATION AND INVENTION, can you think of at least three Innovations or Inventions you have heard of recently?
We know it’s not easy! Because most of our learning comes from the school, and unfortunately the school system doesn’t leave enough of free time for us to learn about new innovations happening around the world. Innovations and inventions extend the human life forward. Hundreds of innovations have changed the way we live everyday but we hardly know about them.
Here are some examples of recent innovations in various areas of science and technology.

It took 7 days to build 1 KM highway 10 years ago. Now it takes 4-5 hours.

The Mars Orbiter Mission sent by ISRO’s cost was 7 Rs/km, less than an Auto Rickshaw.
So are you ready to learn more about innovations and inventions changing our lives right now?
Do you want to know what causes innovations and inventions and where do we stand in the innovations eco-system?

Participate in this Innovations and Inventions Challenge on Crawded and learn all about recent innovations.

7 Days. Hundreds of […]

The Man Who Knew Infinity Challenge on Crawded

What is “The Man Who Knew Infinity” Challenge?

Srinivasa Ramanujan  – to remember the forgotten genius, we at Crawded are opening up a small online challenge where few basic arithmetic and puzzle type questions will be asked. Not to mention, a movie has also been released recently depicting the story of the Genius Mathematician Srinivasa Ramanujan and all of you Math Lovers must watch it!

He believed every equation was an expression of god
This challenge is more like a test of reasoning than of knowledge, you don’t really need a PhD in Math, but you do need to be brutally smart.
Some more details on the “forgotten” genius Srinivasa Ramanujan
Having failed his degree because he could not concentrate on any subject other than maths, he lived in Madras on the brink of starvation, scribbling equations in chalk on the flagstones of the local temple because he could not afford paper. There he might have stayed were it not for the eminent Cambridge professor of mathematics, GH Hardy. Hardy recognised the young man’s brilliance and invited him to Trinity College, where they collaborated on a string of mathematical breakthroughs. In his all-too-brief life, Ramanujan is credited with independently compiling 3,900 results.
It’s an extraordinary story […]

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