Level of sound is related to intensity by this equation
given that
L = 85 dB
also we know that
now we have
By solving above equation
now above is the intensity due to two firecrackers and if we wish to find the sound level of one firecracker then we will find its half level intensity
now again by above formula
Answer:
754.8 m
Explanation:
The centripetal acceleration is given by
where v is the speed of the airplane and r is the radius of the loop.
We can rewrite the speed of the airplane as the ratio between the length of the circumference () and the time taken:
Substituting in the formula of the acceleration, we have
Re-arranging the formula and putting the numbers of the problem into it, we can find the radius of the loop, r: