3 years ago

By which factor is the sound intensity decreased at 3 meters?

Physics

1 answer:

Nostrana [21]3 years ago

3 0

Answer:

what should be done io protect forests

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A car rolls backward from -2 to -10 m/s in 4 seconds. what is the acceleration. PLEASE HELP WILL GIVE BRAINLIEST

pashok25 [27]

$\bf \underline{Given : }$

Initial velocity,u = -2 m/s

Final velocity,v = -10 m/s

Time taken, t = 4 seconds

$\bf \underline{To \: find \: out : }$

Find the acceleration ( a ) .

$\bf \underline{Solution : }$

We know that,

$\sf \: Acceleration = \dfrac{v - u}{t}$

Substituting the values in the above formula, we get

$\implies \sf \: Acceleration = \dfrac{ - 10 - ( - 2)}{4}$

$\implies\sf \: Acceleration = \dfrac{ - 10 + 2}{4}$

$\implies \sf \: Acceleration = \cancel \dfrac{ - 8}{4}$

$\implies\sf \: Acceleration = - 2 \: ms {}^{ - 2}$

Hence,the acceleration of a body is -2 m/s².

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4 years ago

What human body feature allows the respiratory system to take in oxygen

alexandr1967 [171]

The answer to your question is: the lungs.

The lungs allow the respiratory system to take in oxygen.

(Hope this helps!)

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3 years ago

What does a calorimeter directly measure?

julia-pushkina [17]

Change in temperature

A calorimeter directly measures temperature change and this information, along with the substance's mass and specific heat, is used to calculate the amount of heat.<span />

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3 years ago

What is the average speed of a car that traveled 300.0 miles in 5.5 hours?

kirill115 [55]

Speed (or Velocity) = Distance divided by time. So,
speed = 300/5.5
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4 years ago

Read 2 more answers

At t=0, a particle leaves the origin with a velocity of 9.0 m/s in the positive y direction and moves in the xy plane with a con

fiasKO [112]

Answer:

e.26m/s

Explanation:

Vf=Vi+at (1)

Vf=9j+(2i-4j)t

X= X₀+at

now, in the i direction

15=O+2t or t=7.5 when x position is 15

Lets put that into the (1) equation, solve for Vf.

Vf=9j+(2i-4j)7.5

Vf= 15i - 21j

Speed= $\sqrt{xcomponent^2 + ycomponent^2}$

Vf= 25.8 m/s

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3 years ago