The original unit for measuring the amount of radioactivity was the curie (Ci)-first defined to correspond to one gram of radium-226 and more recently defined as:
1 curie = 3.7x1010 radioactive decays per second[exactly].
In the International System of Units (SI) the curie has been replaced by the becquerel (Bq), where
1 becquerel = 1 radioactive decay per second = 2.703x10-11 Ci.
The magnitude of radiation exposures is specified in terms of the radiation dose. There are two important categories of dose:
The biological impact is specified by the dose equivalentH, which is the product of the absorbed dose D and the quality factor Q: H = Q D.
The unit for the dose equivalent is the rem if the absorbed dose is in rads and the sievert (Sv) if the absorbed dose is in grays. Thus, 1 Sv = 100 rem. As discussed below, 1 rem is roughly the average dose received in 3 years of exposure to natural radiation. 1 Sv is at the bottom of the range of doses that, if received over a short period of time, are likely to cause noticeable symptoms of radiation sickness.
The dose equivalent is still not the whole story. If only part of the body is irradiated, the dose must be discounted with an appropriate weighting factor if it is to reflect overall risk. The discounted dose is termed the effective dose equivalent or just the effective dose, expressed in rems or sieverts.
Instruments called Radiacs. There are many kinds of Radiacs, depending on the purpose they are used for. Everything from Geiger counters for instant readings of dose rate to Ionization Chambers to Dosimeters like pen and film-badge dosimeters which are to be read later for keeping individual exposure records.
There are several different units, some are:
A Geiger-muller tube or a Geiger counter
any of various types of radiacs.
to measure radioactivity and to make maps
i don't know but for sure their must be some method to measure the radioactivity from distance. and fist of all radioactivity is phenomenon in which radioactive elements emit some rays so the intensity of those rays can be measured from the distance
Well if it was deep in the ground it was probably old.
Human + A lot of radioactivity = Dead
Artifical radioactivity
You cannot measure radioactivity in litres
radioactivity
With a Geiger counter.
A geiger counter measures radioactivity.
to measure radioactivity and to make maps
The exact age of the rock.
The isotope 22Na is radioactive but the concentration is extremely low. A measure of the radioactivity is not necessary.
The mass is measured with a balance.The radioactivity is measured with a gamma-radiometer.
i don't know but for sure their must be some method to measure the radioactivity from distance. and fist of all radioactivity is phenomenon in which radioactive elements emit some rays so the intensity of those rays can be measured from the distance
pH meter to measure the acidityruler or caliper for linear dimensionstape measure for the circumferencescale for the masscolorimeter for the hue or colorthermometer for the temperatureGeiger meter for the radioactivity...
Short answer: Yes, through observation you can tell what happens in a given interval of time.Long answer: It is not possible to measure everythingthat happens in a given interval of time, but only atomic (individual) changes. For instance, if you wanted to measure radioactive decay over a period of time, you would measure the amount of radioactivity at a starting point, measure a set amount of time passing then measure the level of radioactivity at the end. Subtracting the last measured radioactivity from the initial measurement will give you the amount of radioactive decay. In a simpler example, you could measure your height on January 1st of 2012, then again on January 1st of 2013 to see how your height has changed over the course of one year.
Radioactivity affect the water molecules. Radioactivity makes it harmful