Answer:
use different energy sources
Explanation:
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
For this case we have the following measures in the international system:
- <em>For the length:
</em>
It is a unit that is used to measure the length of any object: Meter.
The mass in the international system is denoted by: kilogram. It is used to have an approximate idea of the weight of objects.
The measure in the international system is: Seconds. It is used to know how much time elapses in an event to be studied.
- <em>For the temperature:
</em>
The measure in the international system is: Kelvin. It is used to get an idea of how cold or hot an object, process, place, person can be.
Answer:
Length: meter
Mass: Kilogram
Time: Second
Temperature: Kelvin
Answer:
different value to l if n=5 are 0,1,2,3,4
Answer:
Electromagnetic waves differ from mechanical waves in that they do not require a medium to propagate. This means that electromagnetic waves can travel not only through air and solid materials, but also through the vacuum of space.
Explanation: