Tutorial atom and nucleon number

The secret is using a Laser Sail, which you will recall is a photon sail beam-powered by a remote laser installation.

I have felt their thoughts. However, refined Compton experiments showed that energy—momentum is conserved extraordinarily well in elementary processes; and also that the jolting of the electron and the generation of a new photon in Compton scattering obey causality to within 10 ps.

The new Power had no weapons on the ground, nothing but a comm laser. Turns out the weapon had been infected by a stowaway computer virus. The amount of money in the budget is that needed to bring us back on schedule. Dipolar coupling NMR Dipolar coupling vectors Nuclear spins exhibit a dipole momentwhich interacts with the dipole moment of other nuclei dipolar coupling.

Banks's " Culture " series in which an advanced form of ECM — " Electromagnetic Effectors " — are the primary weapon in space combat. It went on waiting. Fifty years from now our understanding of controlled-fusion processes will probably have eliminated that source of shortages too, but in the meantime shorter-sighted political considerations are recreating the climate of tension and rivalry that hinged around the oil issue at the close of the last century.

Many more such ships reach their destinations but never send out a landing party—the task of building farms and cities sounds like dirty complicated hardship, not to mention that children born in a cozy enclosed vessel may be terrified by the wide open spaces of an entire world.

The planet Microsoft won't have much luck hacking the invading Apple fighters — let alone the mechanical AIs of the Babbage fleet or the analog computers of the HAL ships. Did you say the intruder is moving faster than it ought to be. I thought I had dealt confidently with his questions and overcome his objections, but, strangely, he expressed skepticism.

Its hands are going to be real full when the children become teenagers. The optimum energy efficiency would actually be reached at an terminal velocity equal to the exhaust velocity.

As is well known, Galactica was one of the few remaining Battlestar-class vessels without integrated networks, a bias derived from the original Cylon War, when the Cylons were able to seize control of defense systems by viral attacks. Fresh was silent, knowing that he had lost another skirmish.

Once unfrozen, these Earthlings will be the first to step onto their new planet.


So you give someone an inch and they want a yard. Then the lasers turn off.

Solid-state nuclear magnetic resonance

Play your part with skill, courage and honour and no ill will be thought of you by those who survive and succeed. The collision warning … Eagle told us it was about to crash into us. All sorts of things are permitted by general relativity but physically or logistically impossible.

There would be no jump. This isn't to say that you can't write a story using STL, but it would be good if you spread the magic technology more widely than just in your ship. But the size of the lens has to be increased for the deceleration phase.

Thus, if power satellites are constructed in the next few decades, they could be used to launch a squadron of Starwisp probes to the nearer stars during their "checkout" phase. After a few hundred years, enough damage will accumulate so that a corpse instead of a living person is thawed out at journey's end.

Eesyan looked down at the floor. But you change perceived acceleration, too—and you change that even more. If you've got a small, closed ecosystem, shit can't just happen, it has to be excreted in precise amounts and on schedule. Thirty-three kilometers above the Indian Ocean, the point began to encounter too much air.

But, I recovered quickly. The enemy, too, is patient. The advantage is the starship does not have to carry the mass of the engine and the propellant, you leave it at home. Getting to a new planet: The concept is sort of a combination of sleeper starship and generation starship.

Glossary of Astronomical and Cosmological Terms

The probe uses the beam for braking. Eventually, if all goes well, it will arrive at same place insulated by unimaginable distance from the problems that promise to make strife an inseparable and ineradicable part of the weary story of human existence on this planet.

absolute magnitude: the magnitude an object would have at the standard distance of 10 parsecs. absorption line: a more or less narrow range of wavelengths in a spectrum that is darker than neighboring wavelengths.

Absorption lines are seen in stars. angles: are measured in degrees or arcminutes. Here is a history of older questions and answers processed by "Ask the Physicist!". If you like my answer, please consider making a donation to help support this service.

Any Star Trek fan can tell you that when it comes to the most bang for your buck, you can't beat antimatter (sometimes called "Contra-terrene" or "Seetee").How much bang? Well, in theory if you mix one gram of matter with one gram of antimatter you should get e14 joules of.

The photon is a type of elementary particle, the quantum of the electromagnetic field including electromagnetic radiation such as light, and the force carrier for the electromagnetic force (even when static via virtual particles).The photon has zero rest mass and always moves at the speed of light within a vacuum.

Like all elementary particles, photons are currently best explained by quantum.


Solid-state NMR (SSNMR) spectroscopy is a kind of nuclear magnetic resonance (NMR) spectroscopy, characterized by the presence of anisotropic (directionally dependent) interactions.

Here is a history of older questions and answers processed by "Ask the Physicist!".

Glossary of Astronomical and Cosmological Terms

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Tutorial atom and nucleon number
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