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dalvyx [7]
3 years ago
10

Please help~~~ thank you ❤️

Chemistry
1 answer:
Luba_88 [7]3 years ago
4 0

Answer:

a. 1 only

Explanation:

1. Fe^{+2}O^{-2}

2. Fe_{2}^{+3}S_{3}^{-2}

3. Fe^{0}

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Explanation:

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1. Changing Beam Material

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Changing Beam Material

Some materials are stronger when used in beams than others. Beams made of steel for instance are stronger than beams made of wood. Therefore changing material can improve the strength of the beam. It is quite important to take into account the weights of the material though as different structures have different requirements.

Corrugation.

You can fold the beam into triangular shapes to increase strength. If you look at roofs you will notice that they are folded and this increased their strength. The same logic can be applied to beams.

Changing Beam Form

Another way to make Beams stronger is to change their form or rather their shape. Straight beams are not as strong as I-beams for instance. I-beams look like the capital letter I with the lines at both ends. I-beams are usually used in construction which shows that they are quite strong.

Steel Reinforcing Bars

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The motion of a toy truck was investigated. The total distance covered vs. time was recorded in the table.
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Answer:

Where the chart pls I can answer

Explanation:

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