Transmission holograms create a 3-D image when monochromatic light, or light that is all one wavelength, travels through them. Reflection holograms create a 3-D image when laser light or white light reflects off of their surface. For the sake of simplicity, this article discusses transmission ...
But recently, researchers have figured out how to coat sand grains with graphite oxide to create "super sand" that can reportedly filter harmful contaminants, such as mercury, from water five times as effectively as ordinary sand. Efforts continue to find ways to make super sand absorb even mor...
There are currently two rovers on the Martian surface: Curiosity and Perseverance. Curiosity, which has 17 cameras, landed in the Gale Crater in 2012. The Curiosity Rover that houses the Mars Science Laboratory is roughly twice the size of Spirit and Opportunity. About 10 feet (3 meters) long...
The Mercury 7, NASA's first astronauts, were all military pilots. Image courtesy NASA Today, the process for recruiting astronauts is streamlined and efficient. But when NASA set out to recruit the very first astronauts in 1958, it was entering unknown territory. One of the big problems ha...
Mercury is the closest planet to the Sun. Your weight on Mercury would be 38% of your weight on Earth. A solar day on the surface of Mercury lasts 176 Earth days. A year on Mercury takes 88 Earth days. How much longer will the Earth be habitable?
During each Mercury Retrograde, the cosmic trickster will certain have some surprises up his sleeve. The truth inevitably comes boiling to the surface during this phase, as mysteries reveal and skeletons tumble out of the closets. How does Mercury Retrograde affect you?
We find that simulated concentrations of mercury in both snowpacks and the atmosphere's surface layer agree closely with observations. The simulated concentration of mercury in both in the top 30 cm and the top 150 cm of the snowpack, averaged over 2005???2009, is predominantly below 6 ng ...
Surface tension is commonly expressed in joules per square meter. Different liquids have varying surface tensions. Organic liquids, such as alcohol, have a lower surface tension. And other liquids such as mercury or soap bubbles have a higher surface tension....
The answer to that isyes. OnMercury, for example, there isno atmosphereto impair the Sun´s rays, only a thin layer called an exosphere, so on the surface you would experience powerful Sun,open skiesand intense heat with temperatures up to 430 degrees celsius (800 Fahrenheit). ...
The visible surface layer of the Sun, called the photosphere, is a toasty 5,800 Kelvin (about 5,600 Celsius, or 10,000 degrees Fahrenheit). But the average temperature of the Sun'scoronais up to 300,000 K, and it can reach temperatures in the millions of degrees during high-energy ...