Sentences with phrase «when nuclear reactions»

When the nuclear reactions that power them run out of fuel, the stars can no longer resist their own intense gravity; they collapse and trigger the massive explosions called supernovae.

Nuclear fusion, the process that powers our sun, happens when nuclear reactions between light elements produce heavier ones.

Not exact matches

For instead of foresight and planning, there is only reaction, and the great problem is that it is never possible to know in advance when it will be too late to react to a calamitous environmental change — especially in a nuclear age!

When I was producing the film about Old Sturbridge Village — this was the point at which the film bug and the history bug sort of fused, like a nuclear reaction.

A new option for powering the sun appeared in the 1930s when physicists began to understand the energy released in nuclear reactions.

When a white dwarf grows heavier than this, it can no longer support its own weight and starts collapsing, triggering nuclear reactions that rip the star to shreds in a type 1a supernova.

When the reactor malfunctions or when operators need to shut off the reactor for any other reason technicians can remotely plunge control rods into the reactor core to soak up neutrons and shut down the nuclear reactWhen the reactor malfunctions or when operators need to shut off the reactor for any other reason technicians can remotely plunge control rods into the reactor core to soak up neutrons and shut down the nuclear reactwhen operators need to shut off the reactor for any other reason technicians can remotely plunge control rods into the reactor core to soak up neutrons and shut down the nuclear reaction.

When the head of the Atomic Energy Commission at the time, Lewis Strauss, infamously quipped in 1954 that electricity would become «too cheap to meter,» he was likely referring to nuclear fusion, not nuclear fission, the atom - splitting reaction that powers conventional nuclear power plants today.

Such a supernova is supposed to result when a larger companion star dumps material onto the white dwarf, triggering a runaway nuclear reaction that annihilates the small star.

When a neutrino traveling through the earth collides with an atom in a molecule of ice, a little nuclear reaction can occur, producing blue light.

Cosmologists have demonstrated that hydrogen and helium and their stable isotopes like deuterium were all synthesized just minutes after the Big Bang, when the Universe was hot enough to power nuclear reactions.

After that, we presumably would be able to see the proto - galaxies, the beginning, just the first wave of star formation when the first common formation of matter started collapsing and becoming hot enough to produce the nuclear reactions that created stars.

White dwarfs shine simply from the release of the heat left over from when the star was still producing energy from nuclear reactions.

For example — when I took physics four decades ago, the environment around an atom wasn't mentioned as affecting nuclear decay (heck, the physical / microwave environment around molecules wasn't discussed as affecting chemical reactions)

I'll be writing much more about this issue, as I promised when I recently explored the starkly different reactions from two prominent environmentalists to the still - unfolding events at the Fukushima Daiichi nuclear complex.

As a physicist, I winced when I read «This is because energy can not just be created or destroyed (unless it involves nuclear reactions or takes place on quantum physics scales).»

Is there a need for a greenhouse gas effect when none of the Energy balances issued from 1824 to the present include the «heat of the earth itself» There is a layer of molten material below the surface of the earth (probable keep hot by nuclear materials reactions) that CAN ACCOUNT FOR MUCH OF THE EARTHS CONTINUING TEMPERATURE WHEN ADDED TO THE SOLAR ENERGY INPUT FROM THE when none of the Energy balances issued from 1824 to the present include the «heat of the earth itself» There is a layer of molten material below the surface of the earth (probable keep hot by nuclear materials reactions) that CAN ACCOUNT FOR MUCH OF THE EARTHS CONTINUING TEMPERATURE WHEN ADDED TO THE SOLAR ENERGY INPUT FROM THE WHEN ADDED TO THE SOLAR ENERGY INPUT FROM THE SUN.

While nuclear energy is regarded as the lesser of the two evils when compared at an emission level to the burning of fossil - fuels, it may trump on the containment of the heat process, which burns in a contained nuclear reactor through an in - ward heat - chemical reaction called fission, but nuclear energy production is a chain from uranium mining to the toxic waste disposal and therefore as an entire process is an equally high risk environmental option.

When protons from GCRs collide with the nitrogen - 14 (seven protons plus seven neutrons in the nucleus) in the air, carbon - 14 is created (in addition to other isotopes such as beryllium - 10) through a nuclear reaction: