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It's a type of mechanical scales used for accurate measurements.

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Q: What is a double beam balance?
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Which one have more deflection hollow beam or solid beam?

solid beam have more deflection


Why does a longer beam length mean greater deflection?

Deflection of beam depends upon load and length of beam. Larger the beam, larger will be it's selfweight


What is propped simply supported beam?

A cantilever beam is a beam which is fixed at one end ( no translation or rotation). A propped cantilever beam is a beam which is fixed at one end ( no translation or rotation) and simply supported ( no translation) at the other end. A cantilever beam is a beam which is fixed at one end ( no translation or rotation). A simply supported beam is a beam which is simply supported at both ends. A propped simply supported beam is a beam which is simply supported at both ends and simply supported at some other point such as at the center, to reduce deflection under load. Propped beams are statically indeterminate.


What is the advantage and disadvantages of fixed beams?

There isn't really an advantage of having a fixed beam vs. a simply supported beam, it depends on what application the beam is for. If one of the design criteria of the beam is that it be able to deflect from one end to another then you are going to want to use a fixed beam. For example such applications could include a diving bored. A simply supported beam differs from a fixed beam because the beam is supported at both ends. Thus when a simply supported beam is loaded, the deflection will occur throughout the beam, since the ends are confined and will remain as they were. Furthermore on a fixed beam, (the end that is fixed) will have restrictive forces and moments keeping the end from moving.


What is a deflection in cantilever beam?

it will depend upon the load and moment applied on the beam.