Accourding to newtons second law of motion:
Force = mass * acceleration
F = ma
a = F/m
Sorry I'm so late, but I just took this test and the answer is white (for people who didn't study well ;) )
These substances are called insulators. We also have a class of substance called a semi-conductor. They share many properties with insulators. You can sometimes see them on telephone poles.
Answer:
The decibel level is 76 dB
Explanation:
We define the sound level through the equation:
β=10*㏒( )Equation 1
The constant Io is the reference intensity
Io=
I is the intensity in Watts for each square meter to which the sound level B corresponds, where B is measured in decibels (dB).
For this problem we have the following data:
I=
Io=
We replace the data in equation 1:
β=10*㏒
β= 10*㏒*=75.56
β=76 dB
Answer: The decibel level is 76 dB