Explanation:
In the extreme winters , the water inside pipes freeze, on freezing it's(water molecule) density decreases and volume increases and therefore, the ice then expands and pushes the water towards the faucet, causing high pressure buildup in the pipe and after a limit the pipe burst. This is what happened to the family in Ottawa, where winters are chilly.
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
<u>Answer:</u> The amount of time required by chlorine gas to effuse is 19 seconds.
<u>Explanation:</u>
Rate of a gas is defined as the amount of gas displaced in a given amount of time.

To calculate the rate of diffusion of gas, we use Graham's Law.
This law states that the rate of effusion or diffusion of gas is inversely proportional to the square root of the molar mass of the gas. The equation given by this law follows the equation:

So,

We are given:
Moles of iodine gas = 0.15 moles
Moles of chlorine gas = 0.15 moles
Time taken by iodine gas = 36 seconds
Molar mass of iodine gas = 254 g/mol
Molar mass of chlorine gas = 71 g/mol
Putting values in above equation, we get:

Hence, the amount of time required by chlorine gas to effuse is 19 seconds.