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brilliants [131]

3 years ago

13

Which instrument measure the intensity of sound

2 answers:

Vikki [24]3 years ago

5 0

Answer:

Decibel Meter

Explanation:

A decibel meter is a measuring instrument used to assess noise or sound levels by measuring sound pressure.

professor190 [17]3 years ago

3 0

Answer:

Decibel Meter

A decibel meter is a measuring instrument used to assess noise or sound levels by measuring sound pressure. Often referred to as a sound pressure level (SPL) meter, decibel (dB) meter, noise meter or noise dosimeter, a sound level meter uses a microphone to capture sound.

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A girl throws a rock horizontally at 10 m/s from the top of a building, 22 m above street level. Assuming free fall conditions a

MAXImum [283]

Answer:21.18 m

Explanation:

Given

initial speed u=10 m/s

height of building h=22 m

time taken to complete 22 m

$h=ut+\frac{1}{2}at^2$

initial vertical velocity =0

$22=\frac{1}{2}gt^2$

$t=\sqrt{\frac{22\times 2}{g}}$

$t=2.11 s$

Horizontal Distance moved

$R=u_x\times t$

$R=10\times 2.11$

$R=21.18 m$

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Answer:

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How does light from a headlamp use a lens and a mirror to produce a narrow beam?

Kryger [21]

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Which of the following identifies the number of protons in an atom?

Lunna [17]

Answer:

The number of protons can be found by looking at the atomic number

Explanation:

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