JohnDoe
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Determine the reactions at A and C, knowing that α = 30º
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First you have to notice that the contact at A is a roll support, so the reaction force there is perpendicular to the surface. Therefore Fa has 60 degree against horizontal axis. When you draw free ...

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What materials that can contain water and ultrasound wave can go through
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Any common lab materials will do if all you need is for the ultrasound waves to pass through them, like glass or aluminum plate. More importantly is that the material must not porous and have a good ...

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