Answer:
<h2>Boiling is a very simple method of water disinfection. Heating water to a high temperature, 100°C, kills most of the pathogenic organisms, particularly viruses and bacteria causing waterborne diseases. In order for boiling to be most effective, the water must boil for at least 20 minutes. </h2>
Explanation:
Answer:
There are often not more than one or two independent variables tested in an experiment.
The specific heat capacity of water is 4200J/(kg*℃). So when absorbs 209 joules, the water sample will increase 209/(4200*0.01)=5℃. So the final temperature of sample is 23+5=28℃.
The property makes the materials used in fiber optic cables is:
C. High density
<h3>Fiber optic cables:</h3>
They transfer data signals in the form of light and travel hundreds of miles significantly faster than those used in traditional electrical cables. Fiber is immune to electrical interference. There is no cross - talk between signals in different cables and no pickup of environmental noise. Information traveling inside the optical fiber is even immune to electromagnetic pulses generated by nuclear devices.
Thus, correct option is C.
Find more information about Fiber optic cables here:
brainly.com/question/116766
