Answer:
39.8 m ≈ 40 m
Explanation:
power (P) = 50 W
sound intensity level (
) = 94 dB
the distance (r) can be gotten from the equation I = 
(take not that π is shown as 
)
making r the subject of the formula we have r = 
(take not that π is shown as )
But to apply this equation we need to get the value of the intensity (I)
- we can get the intensity (I) from the formula sound intensity level () = 10 log₁₀
- rearranging the above formula we have intensity (I) =
- I' = reference intensity = 1 x
- now substituting all required values into the formula for intensity (I)
- I =
= 0.00251 
now that we have the value of the intensity (I) we can substitute it into the formula for the distance (r)
distance (r) =
r = 
= 39.8 m ≈ 40 m
Close to 14 is considered a strong base.
(3 waves) / ( 2seconds) =
(3/2) / (wave/second) = 1.5 per second = <em>1.5 Hz</em>.
Every object in the universe attracts every other object with a force which is proportional to the product of their masses and inversely proportional to the square of the distance between them. The forces along the line joining the centre of the two objects.
❍ Let us consider two masses m1 and m2 line at a separation distance d. Let the force of attraction between the two objects be F.
According to universal law of gravitation,
Also,
Combining both, We will get
Or, We can write it as,
Where, G is the constant of proportionality and it is called 'Universal Gravitational constant'.
☯️ Hence, derived !!
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Pulmonary Arteries: Blood vessels that carry deoxygenated blood from the heart to the lungs. Superior Vena Cava: A large vein that delivers deoxygenated blood from the upper body into the heart. Hope this helps
