Answer:
A radioactive element or radioactive substance have a half life
Explanation:
The half life of a radioactive element is defined as the time taken for the atoms of the radioactive elements to decay to half the original number
Radioactive decay
Radioactive decay simply the process by which the nucleus of a heavy radioactive element disintegrates and emits alpha or beta particles along with Gama rays
Law of radioactivity
The law states that when a radio active element decays or disintegrates it forms a new element two places below in the periodic table with emission of alpha particles or two places above the element in the periodic table with emission of beta particle.
Answer:
A. 0.32s
Explanation:
Lets find the initial velocity of the vertical component
Cos23=u/4
4cos23=1.6m/s
then time, t =2u/g
2×1.6/9.8
=0.32seconds
Answer:
The definitive and unifying theme or idea of a story or article. It encompasses all the aspects necessary to create a coherent main idea. The central idea is typically expressed as a universal truth or theme that is built and supported by the setting and characters in a story.
Explanation:
This is the correct answer to your question.
Hope this helps!!!
Kyle.