2 years ago

Explain the three ways that machines can make work easier

1 answer:

8 0

1. they work ways faster
2. you don't need 100 people making the same thing at once
3. its a better chance of not getting an injury

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Describe how the pH of a solution can be calculated

hjlf

Answer:

The pH of an aqueous solution is the measure of how acidic or basic it is. The pH of an aqueous solution can be determined and calculated by using the concentration of hydronium ion concentration in the solution.

Explanation:

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2 years ago

55. Which Element has a larger radius- Rb or I?

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Rb has larger radius.

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Heat is transferred by conduction through a wall of thickness 0.87 m. What is the rate of heat transfer if the walls thermal con

erik [133]

Explanation:

The given data is as follows.

Thickness (dx) = 0.87 m, thermal conductivity (k) = 13 W/m-K

Surface area (A) = 5 $m^{2}$ , $T_{1} = 14^{o}C$

$T_{2} = 93^{o}C$

According to Fourier's law,

Q = $-kA \frac{dT}{dx}$

Hence, putting the given values into the above formula as follows.

Q = $-kA \frac{dT}{dx}$

= $-13 W/m-k \times 5 m^{2} \times \frac{(14 - 93)}{0.87 m}$

= 5902.298 W

Therefore, we can conclude that the rate of heat transfer is 5902.298 W.

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Butanoic acid + 1-pentanol

lutik1710 [3]

Answer: X is an Esther

Explanation: alcohol and carboxylate acid forms esters

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Choose all the right answers.

gayaneshka [121]

I think the answer is

Reduce friction

:)

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