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OleMash [197]
3 years ago
14

How do produces light snd heat

Chemistry
1 answer:
lina2011 [118]3 years ago
4 0
The sun I hope this helps
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Cdvshduejsnxhhwjxhxh ydujdbxg
fiasKO [112]

Answer:

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Explanation:

5 0
2 years ago
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Which of the following compounds has an atom with an unfilled valence shell of electrons? And why?A. H3O+B. BF3C. CH3OHD. NaI
adoni [48]

Answer: BF3

Explanation: boron needs 4 electron to obtain octet and Fluorine has just one. For the valence shell to be completely filled it will have to form BF4- with 4 fluorine atom surrounding it.

8 0
3 years ago
(a) what is the approximate ductility (%el) of a brass that has a yield strength of 230 mpa (33360 psi)?
ss7ja [257]

Based on the calculations, the approximate ductility (%el) of this brass is equal to 2.3%.

<u>Given the following data:</u>

  • Yield strength = 230 mpa (33360 psi).

<h3>What is ductility?</h3>

Ductility can be defined as an important property of a material which determines its ability to become elongated due to the application of stress.

Mathematically, the ductility of a material can be expressed as percentage elongation in length:

\% el = \frac{\Delta L}{L_i} =\frac{L_f - L_i}{L_i}

<u>Where:</u>

  • L_i is the original length.
  • L_f is the final length.
  • \Delta L is the yield strength.

For this exercise, let us assume the original length of this brass is equal to 100 meters.

Substituting the parameters into the formula, we have;

\% el = \frac{230}{100}

Ductility = 2.3%.

Read more on ductility here: brainly.com/question/828860

3 0
1 year ago
How much work does the climber do on his pack if his pack weighs 90 N and he climbs to a height of 30 m?
Vladimir79 [104]

Answer:

2,700j

Explanation:

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2 years ago
What causes a fire tornado to form out of a wildfire??
velikii [3]
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