Answer:
6.02dB
Explanation:
The sound level intensity can be calculated by using the formula:
where Io is the threshold of human hearing, and I is the intensity of the sound in at a certain distance. I is given by
where P is the power of the source and r is the distance to the source. By replacing I in the expression for I(dB) we obtain
when jim halves the distance we have r'=1/2r:
Hence, the change o decibels is:
hope this helps!!
Answer:
The mass of the apples in the box are 1145.95 lb.
Explanation:
Given that,
Width = 3.5 ft
length = 3.5 ft
Depth = 2.75 feet
Density = 49.3 lb/ft³
We need to calculate the volume
Using formula of volume
Put the value
We need to calculate the mass
Using formula of density
Put the value into the formula
But porosity is 31 % so apples is 69% mass of total container.
So, Total mass in pounds is
Hence, The mass of the apples in the box are 1145.95 lb.
