Answer:
Explanation:
Use Doppler effect equation:
The Doppler effect is a physical phenomenon where an apparent change in wave frequency is presented by a sound source with respect to its observer when that same source is in motion. The general equation is given by:
- When the observer moves towards the source is positive.
- When the observer moves away from the source is negative.
- When the source moves towards the observer is negative.
- When the source moves away from the observer is positive.
Since the problem don't give us aditional information let's assume:
Which is the speed of sound in air.
And using the information provided by the problem:
The frequency perceived by the person is 331.046Hz
<em><u>Translation:</u></em>
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Usa la ecuación del Efecto Doppler:
El efecto Doppler es un fenómeno físico en el que una fuente de sonido presenta un cambio aparente en la frecuencia de onda con respecto a su observador cuando esa misma fuente está en movimiento. La ecuación general viene dada por:
- Cuando el observador se mueve hacia la fuente es positivo.
- Cuando el observador se aleja de la fuente es negativo.
- Cuando la fuente se mueve hacia el observador es negativa.
- Cuando la fuente se aleja del observador es positiva.
Como el problema no nos da información adicional, supongamos que:
La cuál es la velocidad del sonido en el aire.
Y utilizando la información proporcionada por el problema:
La frecuencia percibida por la persona es 331.046Hz
The chemical formula for water, H2o means that each water molecule contains one oxygen atom and two hydrogen atoms. This is the formula for water which has a liquid form, a solid form as ice, and also a gaseous form as water vapor.
Answer:
option (3)
Explanation:
According to the ideal gas equation
PV = nRT
where, P is pressure, V is volume, R is gas constant and T be the absolute temperature.
At constant volume,
P ∝ T
If the temperature is doubled, the pressure also doubled.
As volume is constant, so the density is also constant.
So, the pressure is doubled and the density remain constant.
<span>A major characteristic of both volcanoes and earthquakes is that they are located in the same geographic area. Most earthquakes are along the edges of tectonic plates. This is where most volcanoes are too. Most earthquakes directly beneath a volcano are caused by the movement of magma.</span>
The answer is A. The kinetic energy