Gravity. The average person probably doesn’t think about it on a daily basis, but yet gravity affects our every move. Because of gravity, we fall down (not up), objects crash to the floor, and we don’t go flying off into space when we jump in the air. The old adage, “everything that goes up must come down” makes perfect sense to everyone because from the day we are born, we are seemingly bound to Earth’s surface due to this all-pervasive invisible force.
Quantum physics is a fascinating yet complicated subject to understand, and one of the things that freaks out physics students every is the concept of entanglement. That occurs when physicists attempt to measure the state of a particle and that affects the state of another particle instantly. (In reality, the particles are in multiple states — spinning in multiple directions, for example — and can only be said to be in one state or another when they are measured.)
Why should you be concerned about nanoparticles, and what are they anyway? You are probably being exposed to these extremely small particles every day and are unaware of their consequences. But is something so small really that scary? Scientists say the answer may be yes.
In the Leidenfrost Effect, a water droplet will float on a layer of its own vapor if heated to certain temperature. This common cooking phenomenon takes center stage in a series of playful experiments by physicists at the University of Bath, who discovered new and fun means to manipulate the movement of water.
Some of the most familiar scientific breakthroughs and discoveries came while the researcher was looking for something completely different, while others were just plain luck. It always helps if you are open to the possibility of using what you’ve got as well as what you’re looking for!
A look at the forces of gravity and the role it plays in the formation of the universe and the objects within it; how weightlessness affects astronauts in space, and how pilots experience the effects of gravity in their training on the “vomit comet”.
The IceCube neutrino observatory buried at the South Pole is one cool telescope. It has detected extremely high-energy neutrinos, which are elementary particles that likely originate outside our solar system. The discovery of 28 record-breaking neutrinos was announced earlier – with two of the particles — nicknamed Bert and Ernie – drawing particular attention because of the their off-the-chart energy of over 1,000,000,000,000,000 electron volts or 1 peta-electron volt (PeV).
Time Dilation – boosting 5 seconds to fill 10 seconds since 1905
We know that the dark matter has to be pretty cold – moving so slowly that its motion hardly matters – and that allows us to predict in great detail the large scale structure of the universe.
The energy in the universe never increases or decreases — but it does move around a lot. Energy can be potential (like a stretched-out rubber band waiting to snap) or kinetic (like the molecules that vibrate within any substance). And though we can’t exactly see it, every time we cook dinner or shiver on a cold night, we know it’s there. George Zaidan and Charles Morton get excited about energy.
The Mpemba effect is the theory that warmer water can freeze faster than colder water. Scientists have known the phenomenon since the time of Aristotle in Ancient Greece, but until now they have struggled to explain why.