What did Robert Boyle discover?

What will be an ideal response?


During Boyle’s experiments from 1627 to 1691, he discovered that at a
constant temperature, the pressure of a gas varies inversely with its volume. In
other words, if a gas expands it cools, but if it is compressed it will heat up.
Boyle also discovered that we need air to transmit sound as well as building one
of the first vacuum pumps.

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Synchronous motors are often made to have a leading power factor by ____________________ of the rotor current.

Fill in the blank(s) with the appropriate word(s).

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To obtain complete voltage control, the triac, like the SCR, must be ____________________.

Fill in the blank(s) with the appropriate word(s).

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"Rust dust" is an indication of what fault?

A) Broken blocker rings B) Worn steel parts such as U-joints C) Fluid leak D) A slipping clutch

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Technician A says that disc brake pads should be replaced when worn to the thickness of the steel backing. Technician B says the pads should be removed and inspected whenever there is a brake performance complaint. Which technician is correct?

A) Technician A only B) Technician B only C) Both technicians A and B D) Neither technician A nor B

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