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valina [46]
2 years ago
10

Mobile water supply operations, such as water shuttles or relay pumping, must be performed:_____.

Chemistry
1 answer:
ZanzabumX [31]2 years ago
7 0

Mobile water supply operations, such as water shuttles or relay pumping, must be performed<u> In rural areas without public water </u><u>distribution systems</u>

What operation is the pumping station started at the fire scene to return the water line to the water source? Reverse position. Water extinguishes the fire by absorbing heat and cooling the burning material.

Dry Barrel Hydrant

This type of hydrant is very common in areas with sub-zero weather. In these areas, the hydrant barrel must be dried to prevent the water in the hydrant barrel from freezing.

When should firefighters stop the flow of water from an automatic sprinkler system in a building? After the fire is under control.

If you are involved in a car or vehicle accident, the first thing you should do is call the police. If contacted, police can verify the identity, insurance, and driver's license status of anyone involved with the vehicle. This may seem like a simple step, but it is very important.

Learn more about distribution systems here;

brainly.com/question/27905732

#SPJ4

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An automated filling machine is used to fill bottles with liquid detergent. A random sample of 20 bottles results in a sample va
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Answer:

No, there is no evidence that the manufacturer has a problem with underfilled or overfilled bottles, due that according our results we cannot reject the null hypothesis.

Explanation:

according to this exercise we have the following:

σ^2 =< 0.01 (null hypothesis)

σ^2 > 0.01 (alternative hypothesis)

To solve we can use the chi-square statistical test. To reject or not the hypothesis, we have that the rejection region X^2 > 30.14

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4 0
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If the freezing point of the solution had been incorrectly read 0.3 °C lower than the true freezing point, would the calculated
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Answer : The molar mass of the solute would be low.

Explanation :

Formula used for depression in freezing point is:  

\Delta T_f=i\times K_f\times m\\\\T^o-T_s=i\times K_f\times\frac{w_b}{M_b}\times w_a}

where,

\Delta T_f = change in freezing point

\Delta T_s = freezing point of solution

\Delta T^o = freezing point of water

i = Van't Hoff factor

K_f = freezing point constant

m = molality

w_b = mass of solute

w_a = mass of solvent

M_b = molar mass of solute

From the formula we conclude that, when the freezing point of the solution read incorrectly that is freezing point of the solution is lower than the true freezing point then this means that change in freezing point would be high and the molar mass of the solute would be low.

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