I’m sorry, this doesnt belong here. But i just cant resist myself from posting it.
Top Gears review on McLaren MP4-12C. “This grips onto the road like a terrified toddler grips onto his mother’s hand”
The only elements that are liquid at room temperature are Bromine and Mercury. Only 4 others (Francium, Cesium, Gallium, and Rubidium) can exist in their liquid form between 25 and 40 degrees C.
(via shychemist)
everyone stop what you’re doing
there’s a platypus on your dash
Proof that God … or Evolution… has a sense of humor.
(via shychemist)
YESSS!! I FOUND THE BLUE PRINTS :D
.. kinda .. :/
Spacetime
In 1905 Einstein showed that space and time are two parts of a unity: spacetime. In our ordinary life, however, we treat space and time differently, measuring one in meters and the other in seconds. They look so distinct in our experience that it seems obvious to measure them in different ways.
If, however, we accept the Einstein’s conclusion about spacetime, we must deal with space and time on an equal footing. So let’s do it!
How much space is 1 hour of space? What about 2 meters of time? Even if hard to grasp in the beginning, these questions are completely reasonable. There is, in fact, a conversion factor between space and time that physicists use to call c and it’s approximately equal to 299,792,458 meters per second.
Wait a minute, is that the speed of light?
Yes. Actually, there’s no particular reason to call it the speed of light, it may be called the speed of graviton as well. As a matter of fact, it’s the speed at which travels every massless particle.
Keeping in mind this new idea we can see that 1 hour of space is the space that light travels in 1 hour (the space traveled by light in one year is probably more familiar to us and we call it one light-year). Similarly 2 meters of time is the time that takes light to travel 2 meters.
This however doesn’t resolve our whole problem, since we’re still left with human-invented units like seconds and meters upon which the universe surely can’t be founded on. To create a description that works independently of the units we must, finally, use the same units for space and time. In this way we have that light travels at 1 meter per meter (that is, each meter of time light travels 1 meter of space), or 1 second per second, or 1 inch per inch etc. In this description the units cancels out and the factor c, the speed of light, has simply value 1. It becomes evident, then, as just a unitless factor of conversion between space and time.
Sources:
- Spacetime Physics by J.A. Wheeler & E.F. Taylor
- http://en.wikipedia.org/wiki/Spacetime
(via likeaphysicist)
10 Years of Aqua Satellite’s Incredible Images of Earth From Space
The view of Earth from space has transformed our understanding of, as well as our admiration for, the planet. The data and images collected by Earth-observing satellites have been used in thousands of scientific papers, helped us better respond to natural disasters, improved weather and climate forecasts, enlightened us about our impact on Earth and captivated us with beauty.
One of the stars of NASA’s fleet of satellites is Aqua. The satellite is named for its ability to measure water vapor in the atmosphere, water in the oceans, as well as ice and snow. When it was launched on May 4, 2002, scientists expected it to work for three to five years. But its six instruments have been functioning perfectly for 10 years, gathering 29 million gigabytes of data in that time.
One of the most useful and impressive instruments aboard Aqua is the Moderate Resolution Imaging Spectroradiometer, which measures visible and infrared radiation, and produces truly amazing, incredibly beautiful images of Earth. We’ve chosen some of our favorite MODIS images for this gallery in celebration of a decade of work. With funding for Earth-observing satellites on the decline, let’s hope Aqua keeps going for 10 more years.
Another cute video on Dark Matter :)
Higgs Boson’s existence explained , in such a cute manner :)
Loved it :)
Antihydrogen undergoes its first-ever measurement | BBC
The antimatter version of the hydrogen atom - antihydrogen - could soon finally give up its secrets.
Scientists expect that antihydrogen will have exactly the same properties as hydrogen; but after 80 years, the test is only just becoming possible.
A report in Nature has shown the first “spectra” of trapped antihydrogen, showing the energy required to change the spins of its positrons.
(via alchymista)
Hey there,