2 years ago

Air entrainment is used in concrete to: __________.

Engineering

1 answer:

Dahasolnce [82]2 years ago

5 0

The answer is number 2) Increase the resistance of the concrete to freeze-thaw damage.

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Examples of reciprocating motion in daily life

bonufazy [111]

Answer:

Examples of reciprocating motion in daily life are;

1) The needles of a sewing machine

2) Electric powered reciprocating saw blade

3) The motion of a manual tire pump

Explanation:

A reciprocating motion is a motion that consists of motion of a part in an upward and downwards $(\updownarrow)$ or in a backward and forward (↔) direction repetitively

Examples of reciprocating motion in daily life includes the reciprocating motion of the needles of a sewing machine and the reciprocating motion of the reciprocating saw and the motion of a manual tire pump

In a sewing machine, a crank shaft in between a wheel and the needle transforms the rotary motion of the wheel into reciprocating motion of the needle.

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Counter argument for why engineers dont make a positive change in the world.

egoroff_w [7]

Answer:

They don't make a positive change in the world because they have made mistakes that aren't able to be made fixed and there are a lot of engineers who haven't study enough and know the important basis of coming to engineer.

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3 years ago

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loris [4]

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Explanation:

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2 years ago

Plz solve the problem

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I attached a photo that explains and gives the answer to your questions. Had to add a border because the whole picture didn’t fit.

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