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3 years ago

For which job would a noise canceling device be the most beneficial?

Physics

2 answers:

musickatia [10]3 years ago

8 0

A carpenter using saws and cutting tools as the tools make loud noises.

Alex Ar [27]3 years ago

6 0

Answer:

a carpenter using saws and cutting tools

Explanation:

In noise cancelling system we know that two sounds are cancelled just by using the concept of destructive interference.

Here when two sounds which are in opposite phase are superimposed with each other then due to this superposition of waves the resultant intensity will be less than the intensity of any individual wave.

This phenomenon is known as destructive interference.

This is used to decrease the level of sound in such a part of work where we have large sound in output so here correct answer will be

a carpenter using saws and cutting tools

This is because it produce large noise while we use this cutting tools

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In doing a load of clothes, a clothes dryer uses 15 A of current at 240 V for 55 min. A personal computer, in contrast, uses 2.7

KatRina [158]

Answer:

Available usage time for the computer = 10.185 hrs

Explanation:

for the dryer;

I = 15 A, V=240 V , t= 55min,

convert time from min to sec. t = 55*60 =3300 sec

Energy = IVt

Energy = 15*240*3300

Energy = 11,880,000 J

=11,800 KJ

using the energy for the clothes dryer to calculate for the time spent on the computer,

Energy = IVt

for the computer;

I = 2.7A V=120V , t=?

$t=\frac{energy}{IV}$

$t=\frac{11,800,000}{2.7*120}$

t=36,666.7sec

convert this value to hour by dividing by 3600

$t=\frac{36,666.7}{3600} \\t=10.185hrs$

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Solnce55 [7]

Answer:

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Explanation:

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Explanation:

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