Answer: The intensity level of sound in the bedroom is 80dB
Explanation:
Intensity of lawn mower at r=1m is 100dB
Beta1= 10dBlog(I1/Io)
100dB= 10dB log(I1/Io)
10^10= I1/Io
I1= Io(10^10)
10^12)×(10^10)= I1
I1=10^-2w/m^2
Intensity of lawn mower at r=20m
I2/I1=(r1/r2)^2 =(1/20)^2
I2= I1(1/400)
I2=2.5×10^-3W_m^2
Intensity of 4 lown mowers at 20m fro. Window
= 10dBlog(4I2/Io)
= 10^-4/10^-12
=80dB
<span>A change from one form of energy
into another is called conservation of energy. The answer is letter C. you
cannot create something and destroy it. An example is eating food. You can see
food as how as a physical being. However, when you eat the food, the digestive
enzymes in your stomach helps break down the food into smaller form. The chemical
energy in the food is being changed into mechanical energy. You need food to
perform the necessary activities in your life. </span>
All are forms of electromagnetic radiation. hope this helps!
Where is the picture cant6 see it
The constant force applied to the rope is 7.72 N.
<h3>Net torque on the drum</h3>
The net torque on the drum is calculated as follows;
Linear speed, v = ωr = 23 x 0.4 = 9.2 m/s
distance traveled = 14 m
<h3>Tangential acceleration</h3>
The acceleration of the drum is calculated as follows;
v² = u² + 2as
v² = 0 + 2as
v² = 2as
a = v²/2s
a = (9.2)/2(14)
a = 0.329 m/s²
<h3>Angular acceleration of the drum</h3>
<h3>Applied force</h3>
The constant force applied to the rope is calculated as follows;
Learn more about net torque here: brainly.com/question/15262027
