Answer:
Let the power delivered by the sound wave be 'P'
Intensity by definition is the power delivered per unit area.
i.e. I =
dA
dP
;
In spherical polar coordinate system dA = r
2
Ω
I =
r
2
Ω
dP
;
I ∝
r
2
1
So if distance increases 3 fold. The Intensity becomes
9
1
times the initial
Red is the lowest because it has the shortest wavelengths
Answer:
- the pressure is specified in atmospheres (atm)
- the volume is specificied in liters (L)
- the temperature is specificied in Kelvin (K)
- the number of moles is specified in mol (mol)
Explanation:
The ideal gas law states that:
where
p is the gas pressure
V is the volume
n is the number of moles
R is the gas constant
T is the absolute temperature
It can be rewritten solving for R
In this problem, the gas constant is written as
this means that:
- the pressure is specified in atmospheres (atm)
- the volume is specificied in liters (L)
- the temperature is specificied in Kelvin (K)
- the number of moles is specified in mol (mol)
Answer:
V
Explanation:
The S. I unit for voltage is v due to the fact that it's volts.