Sentences with phrase «radioactive decay rate»

The 5 years is time in the atmosphere and NOT the radioactive decay rate.

There's weird crap happening far out in the solar system on Voyager and Pioneer spacecraft not being at the position and velocity where theory says they should be and radiothermal power supplies not decaying at rates predicted upon what are axiomatically constant radioactive decay rate of the isotopes like it isn't really a constant at all.

A sharp drop in the radioactive decay rate could alert the world to another Carrington Event.

The changes in radioactive decay rate tracked that pattern, rising and falling on cue over the course of the year.

He stands on the shoulders of giants to invent (not discover, big diff) what is essentially a doo dad that depends on radioactive decay rates, particle physics etc...

No known process can explain how they could mess around with radioactive decay rates.

I read your article on apparent seasonal changes in radioactive decay rates (17 November, p 42).

Not exact matches

The idea is that while the or - ganism was alive it had a known amount of each type of carbon, but that once it has died, the amount of one type of carbon decreases at a known rate through a process of radioactive decay.

Yes, there is error in radioactive dating and variability in decay rates.

Some isotopes that existed when the Solar System formed are radioactive and have decay rates that caused them to become extinct within tens to hundreds of million years.

Analyses of thin mineral deposits partly covering painted cave areas provided minimum age estimates for the art, based on known decay rates of radioactive uranium in the rock.

(A becquerel is a unit of the rate of radioactive decay — or radiation emitted by a substance.)

Mysterious seasonal wobbles in the rate of radioactive decay may be caused by elusive particles from the sun

«The radionuclide ratios we measured in the sediments and the rates of decay and growth of radioactive elements in the impacted sediments allowed us to essentially age - date the contamination to after 2011,» she explained.

This is a routine bookkeeping style of research: According to known physics, this type of radioactive decay is a fundamental process that unfolds at an unchanging rate, and all the researchers were aiming to do was to measure that rate and record it for reference.

Members of a team led by paleoanthropologist Isaiah Nengo estimated the fossil's age by assessing radioactive forms of the element argon in surrounding rock, which decay at a known rate.

Also that day, Fischbach recalls, «when we looked at our data there was a sharp drop in the count rate [the rate of radioactive decay], exactly coincident with the flare.»

Krypton dating is much like the more - heralded carbon - 14 dating technique that measures the decay of a radioactive isotope — which has constant and well - known decay rates — and compares it to a stable isotope.

Each radioactive element decays exponentially, decreasing over time (t) at a rate proportional to the number of atoms there are (N).

Williams looked at the radioactive elements uranium and thorium trapped in these calcite crystals, using them as a kind of clock based on the rate at which uranium decays into thorium.

Scientists agree that tritium, a radioactive isotope of hydrogen, is key to obtaining a precise measurement: As a gas, tritium decays at such a rate that scientists can relatively easily observe its electron byproducts.

(All organisms take in carbon - 14, a rare radioactive isotope, while they are living; when they die, the carbon decays at a steady rate.

Geochronologists often use known rates of radioactive decay of elements in rocks to determine the age of the rock.

Using the known decay rates of various radioactive isotopes, he investigates the chronology of early processes on small planetary objects and studies the chemical and physical aspects of old and young crust - forming processes on Earth.

opes and the expected rate of heat loss, calculations show that the radioactive decay could not have melted Vesta or any other asteroid.

The cause of the heating can not be long - lived radioisotopes; given the primordial concentrations of the isotopes and the expected rate of heat loss, calculations show that the radioactive decay could not have melted Vesta or any other asteroid.

Two major dating methods applied to artifacts and fossils are stratagraphic dating (based upon the particular layer of rock of sediment in which the object is found) or radiometric dating (which is based on the decay rates of certain radioactive isotopes).

The technique hinges on carbon - 14, a radioactive isotope of the element that, unlike other more stable forms of carbon, decays away at a steady rate.

For first order decays (think simple radioactive decay) where the rate constant k does not change over time the rate of change of x with respect to time, dx / dt, in other words how fast it decays,

Because the energy source is symmetrically distributed throughout the shell wall, at some point the external surface of the shell will reach a temperature such that the rate of energy radiated outward by this surface will be equal to the rate at which radioactive decay energy is generated internal to the shell wall.

«The Earth's internal thermal energy flows to the surface by conduction at a rate of 44.2 terawatts (TW), and is replenished by radioactive decay of minerals at a rate of 30 TW.»