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Readme [11.4K]
3 years ago
14

Will two sounds of 50 db constitute a sound of 100 db . Explain

Physics
1 answer:
qaws [65]3 years ago
6 0
Two sounds of 50 db each will NOT constitute a 100 db sound. This is because, the relation that relates levels of sounds is a logarithmic relation and not a direct relation of addition. <span>Each 10 dB increase in sound makes the sound 10 times louder.
</span>This means that, for 50 db, the resultant sound level will be <span>twice as loud is an increase of 10Log (2) = 3.01dB
</span>
The final sound level = 50 + 3.01 = 53.01 db


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Which of the following is not a part of the appendicular skeleton
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Hyoid

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The hyoid is located in the neck area, not the limbs.

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The​ time, t, required to drive a fixed distance varies inversely as the​ speed, r. It takes 3 hr at a speed of 14 ​km/h to driv
kenny6666 [7]

Answer:

time taken with speed 23 km/h will be 1.8 hours or 1 hour 48 minutes

Explanation:

Given:

Time is inversely proportional to the speed

mathematically,

t ∝ (1/r)

let the proportionality constant be 'k'

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t = k/r

therefore, for case 1

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speed = 14 km/hr

3 = k/14

also,

for case 2

let the time be = t

r = 23 km/h

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t = k/23

on dividing equation 2 by 1

we get

\frac{t}{3}=\frac{k/23}{k/14}

or

t=\frac{14\times3}{23}

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3 years ago
A plane is landing at an airport. The plane has a massive amount of kinetic energy due to it's motion. When the plane lands, it
marshall27 [118]

Answer:

A. The brakes used a coil system to convert the kinetic energy into potential energy stored in the brakes

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3 years ago
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3 years ago
A meter stick is balanced at the 50 cm mark. You tie a 20 N weight at the 20 cm mark. Where should a 30 N weight be placed so th
vivado [14]

Answer:

20 cm to the right of the center or 20+50 = 70 cm from the left side.

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As the force is conserved we have

\dfrac{20}{30}\times 30=20\ cm

The distance will be 20 cm to the right of the center or 20+50 = 70 cm from the left side.

7 0
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