To solve the problem it is necessary to apply the concepts related to sound intensity. The most common approach to sound intensity measurement is to use the decibel scale:
Where,
is a reference intensity. It is the lowest or threshold intensity of sound a person with normal hearing can perceive at a frequency of 1000 Hz.
I = Sound intensity
Our values are given by,
For each auto the intensity would be,
Therefore the sound intesity for the 7 autos is
The sound level for the 7 cars in dB is
Answer:
Explanation:
I will GUESS that we're supposed to be looking at a plot of a position in time.
IF that is the case.
THEN the answer would be Point B because it has the steepest slope.
It would b 6 days and 6 hours
You would times 16 by 8 which gives 128km a day. To find how many days you would divide 800 by how many kilometres they cover a day which is 128
So 800/128 =6.25 which converts to 6 days and 6 hours.
Answer:
Explanation:
mass (m1) = 1150 kg
mass (m2) = 1900 kg
impulse (J) = 200 N.s
With what relative speed do the two parts separate because of the detonation?
since both parts separate, their relative speed = speed of m1 + speed of m2
- speed of m1 =
= 
= 0.174 m/s
- speed of m2 = =
= 0.105 m/s - relative speed = 0.174 + 0.105 = 0.279 m/s
