Answer:
Hope it helps!
Explanation:
It is about a modern method of multiple tones in which each tone has its own meaning given to alert the residents of the impending danger – during its occurrence – and its elimination. • The means of warning: 1) Fixed and mobile Warning sirens. 2) Loudspeakers.
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Did not understand the second question
Answer:
- <u>The container must be built of lead, and it should be kept in a concrete vault.</u>
Explanation:
The goal is to contain the <em>gamma rays</em> to<em> reduce</em> the <em>exposure </em>to their harmful <em>radiation</em>.
The gamma rays are the most energetic electromagnetic radiation: they have the smallest wavelength, the largest frequency, and the largest energy from all the electromagnetic radiations.
Due to that, only very dense substances like lead and concrete can stop the gamma rays. In the case of concrete, large blocks with thick walls are required.
Thus, in a lab the best container for a sample of uranium - 238 that is decaying, emitting gamma rays, must be built of lead, and enclosed in a conrete vault.
Answer:
C5H14N2. Ok, what is the question? It smells BAD. I remembered the Mol. formula, but you need a more complete question, OK?
Explanation:
Remember, 1 mole= 6.022x10^23 atoms, molecules, or formula units.
Answer is 1.42x10^24