Sentences with phrase «smaller than a hydrogen»

Now, scientists at UCLA have used a powerful microscope to image the three - dimensional positions of individual atoms to a precision of 19 trillionths of a meter, which is several times smaller than a hydrogen atom.

«Sodium ions are much smaller than the hydrogen protons bound to oxygen molecules in the water in our bodies which are mapped by conventional MRI.

Not exact matches

Pagels (1984) points out that if the relative masses of protons and neutrons were different by a small fraction of 1 per cent, making the proton heavier than the neutron, hydrogen atoms would be unstable since the protons that constitute their nuclei would spontaneously decay into neutrons.

However, the resolution of the LEND instrument is greater than the size of most PFS, so smaller PFS slopes, perhaps approaching yards in size, may have significantly higher abundances, and indications are that the greatest hydrogen concentrations are within the permanently shaded regions, according to McClanahan.

Their mass is too small for full nuclear fusion of hydrogen to helium (with a consequent release of energy) to take place, but they are usually significantly more massive than planets.

But Michael Skrutskie, a University of Virginia astronomer and a member of the WISE science team, is especially interested in the satellite's ability to pick out previously unknown brown dwarfs, objects larger than planets but too small to sustain nuclear fusion of hydrogen.

They seem to explode preferentially in more primitive galaxies — those with smaller quantities of elements heavier than hydrogen or helium — which were more common in the early universe.

But the small telescope may be better at looking even farther into the past than the larger arrays, allowing it to look at hydrogen atoms heated by the very first stars, Bowman says.

Scientists at the National Institute of Standards and Technology (NIST) have developed a new device that measures the motion of super-tiny particles traversing distances almost unimaginably small — shorter than the diameter of a hydrogen atom, or less than one - millionth the width of a human hair.

That is 4 per cent smaller than when using ordinary hydrogen, a discrepancy quantum physics can not explain.

This method will require a small amount of hydrogen to be shipped from Earth to fuel the reaction, but this is a lot lighter than the alternative of shipping lots of oxygen.

While larger planets could have sufficient gravity to attract a massive hydrogen - helium atmosphere, smaller planets — like Mars or Mercury that have less than half the Earth's mass — located in or near their star's habitable zone may lose their initial life - supporting atmosphere because of low gravity and / or the lack of plate tectonics needed to recycle heat - retaining carbon dioxide gas back into the atmosphere (Kasting et al, 1993).

The powertrain is topped by a voltage - control unit that boosts and regulates the electricity created by the hydrogen fuel - cell stack, which is 33 - percent smaller than before thanks to cells that are 20 - percent thinner (down to a single millimeter per cell).

We induce vomiting by a simple small injection, which is much more pleasant for your pet than forcing a cup of nasty tasting hydrogen peroxide down his or her mouth.

This means that an electrolysis unit using the GridShift method would produce at least four times more fuel in the same - sized machine, or require a unit four times smaller than normal to make the same amount of hydrogen.»