Answer:
Nuclear decay rates are constant
Explanation:
Spontaneous decay of unstable nuclei is a process of a statistical nature, it is not possible to predict with certainty when an individual radioactive nucleus will decay, nor can the decay process be influenced in any way.
Therefore, the half-life of radionuclides (specific for each radionuclide) is defined as the time period in which half of the initial number of radioactive nuclei decays.
The unit of measurement for the radioactivity of the material is the becquerel (Bq) and denotes the number of decays in one second (1Bq = 1 decay / 1 second).
Explanation:
It's a soft metal, reactive and with a low melting point, with a relative density of 0,97 at 20ºC (68ºF).
Answer:
Inter-rater agreement
Explanation:
The extent to which two or more raters (or observers, coders, examiners) agree is termed as Inter-rater agreement. It addresses the issue of consistency of the implementation of a rating system.
A high inter-rater agreement value refer to a high degree of agreement between two examiners, vice-versa
I believe the correct answer among the choices presented above is the last option. It is in the Sahara desert that most-likely there is physical water scarcity. This is because it is a desert and it is a characteristic of a desert to have very small or no amount of water. Also, the climate their is very hot.
Answer to question four is B