Monthly Archives: May 2018

How Were The Elements Created?

By Akash Peshin One of the most beautiful things I’ve ever read in my life is that we are literally the remnants of stars. “The nitrogen in our DNA, the calcium in our teeth, the iron in our blood, the carbon in our apple pies were made in the interiors of collapsing stars”, wrote Carl […]

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A list of Formulae and equations widely used

Mechanics velocity v̅ =  Δs Δt v =  ds dt acceleration a̅ =  Δv Δt a =  dv dt equations of motion v = v0 + ats = s0 + v0t + ½at2v2 = v02 + 2a(s − s0)v̅ = ½(v + v0) newton’s 2nd law ∑F = ma ∑F =  dp dt weight W = mg dry friction fs ≤ μsNfk = μkN centripetal accel. ac =  v2 r ac = − ω2r momentum p = mv impulse J = F̅Δt J =  ⌠⌡ F dt impulse-momentum F̅Δt = mΔv ⌠⌡ F dt = Δp work W = F̅Δs cos θ W =  ⌠⌡ F · ds work-energy F̅Δs cos θ = ΔE […]

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Is the universe expanding in the Solar System?

credits: Ganesh Subramaniam, studied at Bengaluru, Karnataka, India,originally from quora credits:messagetoeagle Yes, the Universe is expanding – or to be precise, space is stretching –  and has been ever since the moment it was born – which, according to available evidence, is ~13.80 billion years. “Time” as we know it, is not expanding or stretching. Physicists have measured […]

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How Do You Remove Rust From Tools?

By Akash peshin Rust is one of the biggest threats that can cause the utility of tools and machines to stoop to the level of dead weight.  Like a highly contagious disease, rust gradually spreads over a metal, infecting every atom of which it is composed. If it can consume a one-ton car whole, what can an 18-pound […]

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Eye Openers Why Do Airplanes Need To Fly So High?

By Ashish Most commercial airplanes cruise at an altitude of nearly 35,000 feet – around 6.62 miles in the air! If you think about it, that’s quite high, isn’t it? What’s wrong with flying just a couple miles above the ground, as long as the plane clears all ground structures (e.g., towers and skyscrapers)? Well, first of […]

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How a particle accelerator works?

Infographic by Sarah Gerrity, Energy Department. Whether it’s medical or scientific research, consumer product development or national security, particle accelerators touch nearly every part of our daily lives. Since the early days of the cathode ray tube in the 1890s, particle accelerators have made important contributions to scientific and technological innovation. Today, there are more than […]

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Why We Can’t Look at the Sun

 It is 93 million miles away but can still do a lot of damage By Rachael Rettner, LiveScience on July 7, 2017 Credit:  Grizzlybear.se Flickr During next month’s Great American Total Solar Eclipse, you may be tempted to take in the historic event by gazing directly at the sun, but you absolutely should not do this without the proper eye protection, experts […]

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Why Is 98.6 Degrees The Normal Body Temperature?

By Akash Peshin We’re all aware that the ‘normal’ temperature of our bodies is 37ᵒ C or 98.6ᵒ F. Any reading on a thermometer placed under your tongue that exceeds this mark spurs apprehension — it is a symptom of a fever. However, this fact must not be treated as gospel. For instance, an oral temperature of […]

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Why Are Bubbles Round?

By Ashish, In the case of bubbles, the air molecules trapped inside experience a force from the air molecules outside the bubble. They, in turn, also exert an equal and opposite force. Due to this, the air bubbles inside try to cluster together into a shape that minimizes their contact with the outside air. The […]

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