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
Answer: I think it’s point cd and line cd
Explanation:
Answer:
franklin im pretty sure??
Explanation:
, Electrical engineering from Dr. B. C. Roy Engineering College, Durgapur (2019) In the 18th century, Benjamin Franklin in America tried experiments with charges. It was Franklin who named the two kinds of electricity
Thrust is a reaction force described quantitatively by Newton's third law. When a system expels or accelerates mass in one direction, the accelerated mass will cause a force of equal magnitude but opposite direction on that system. Mathematically can be written as,

Here,
v = speed of the exhaust gases measured relative to the rocket.
= Rate of change of mass with respect to time
Our values are given as,


Replacing we have that


Answer:
<h2>2.55 Hz</h2>
Explanation:
The frequency of the wave given it's velocity and wavelength can be found by using the formula

where
c is the velocity of the wave in m/s
is the wavelength in m
From the question
c = 7.9 m/s
= 3.1 m
We have

We have the final answer as
<h3>2.55 Hz</h3>
Hope this helps you