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General Science

General Science
What is the unit for measuring the amplitude of a sound?

Hum
Coulomb
Decibel
Cycles

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General Science
Very small time intervals are accurately measure by

Pulsars
Quartz clocks
Atomic clocks
White dwarfs

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General Science
The filament of an electric bulb is made of

Tungsten
Iron
Nichrome
Graphite

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General Science
Chlorophyll is a naturally occurring chelate compound in which central metal is

Calcium
Magnesium
Iron
Copper

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General Science
Bell metal is an alloy of

Zinc and Copper
Nickel and Copper
Tin and Copper
Brass and Nickel

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General Science
The average salinity of sea water is

3.5%
4%
3%
3.5%

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