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>
<em><u></u></em>
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
Answer:
the same type because they both formed from rock material.
Explanation:
Answer:
1.F is the electrostatic force between charges (in Newtons),
2.q₁ is the magnitude of the first charge (in Coulombs),
3.q₂ is the magnitude of the second charge (in Coulombs),
4.r is the shortest distance between the charges (in m),
5.ke is the Coulomb's constant. It is equal to 8.98755 × 10⁹ N·m²/C² .
Objective
because it means<span> based on measurement, or reasoning free of bias.</span>
Answer:
1.) Micrometres screw gauge
2.) Tape rule.
Explanation:
Given that the diameter and the length of a thin wire, approximately 1m in length, are measured as accurately as possible.
what are the best instruments to use ?
To measure the diameter of a thin wire, the best instrument to use is known as micrometres screw gauge.
And to measure the length of a thin wire up to 1 m, the measuring device can be tape rule or long metre rule.