By: N. David
When something rises in temperature, we say it has gotten hotter. It seems pretty straightforward. A higher temperature means more heat, so heat and temperature are the same thing, right? It's not quite as simple as that. Yes, heat and temperature are strongly related, but...
By: Wes Kelly
As technologies jet aircraft, rockets and nuclear energy emerged in the mid-20th century out of the terrible strife of World War II. Not an auspicious beginning, certainly enough, but commercial aviation depends on jet aircraft; industrialized countries derive significant fractions of their electrical power...
Is the anthropic principle valid?
By: Ray Burke
We are the aliens Scientists from around the world have gathered at London’s Royal Society to debate the merits of contacting alien civilisations, but they should also discuss another pertinent problem: that humankind may be living anomalies in an anomalous universe, whether there is...
Alternating current (AC) and direct current (DC): A simple explanation
By: David Kopczyk
The battle for dominance between alternating current (AC) and direct current (DC) may never come to a close, as they both are important in today's electronic-fueled society. A short explanation on electricity is necessary to understand the more important nuances of alternating and direct current...
A biography: Nikola Tesla
By: T.S. Garp
Some say he was a man born out of time, a man born too soon, that his inventions changed the world, and that he was an unappreciated genius who wanted to give free energy to people. Nikola Tesla (July 10, 1856 – January 7,1943)...
Alternating current (AC) and direct current (DC): A simple explanation
By: Jerry Walch
My wife, the retired schoolteacher, would warn you that I'm not capable of giving a simple explanation no matter what the subject. I've taught adult continuing education classes in residential electrical repair and I've tried to practice the K.I.S.S. (Keep It Simple...
Could time travel be possible in the future
By: Samrat Man Singh
Imagine going to the past and meeting Einstein, Shakespeare or da Vinci. Imagine going to the future and meeting your great grandchildren. Time traveling opens possibilities to such seemingly impossible tasks. But time traveling itself seems possible. Time traveling means to travel through time and...
By: Virginia Gaces
The diasys spectrophotometer is a brand of spectrophotometer that you can operate manually or semi-manually. Just like any other spectrophotometer, it operates using the Beer-Lambert’s Law in which the amount of light absorbed is directly proportional to the concentration of the solution. Hence, the...
By: Alva A
Why don't ships sink? When things are put into water they make room for themselves by pushing it aside. You push water aside when you get into a bath. That's why you have to be careful not to overfill it. Although ships are heavy, they...
By: D. Vogt
Speed and velocity are often used interchangeably in common conversation. However, in the physical sciences (and especially in physics), the two terms actually refer to specific and different forms of measurement. In particular, speed refers to the rate that an object changes its position over...

 

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