Answer:
f = 295.06 Hz
Explanation:
Este es un típico ejercicio de efecto doppler donde tenemos una fuente emisora de una frecuencia.
En este caso, vemos una ambulancia que se está desplazando a cierta velocidad emitiendo una frecuencia particular. Un observador que está en la calle decide alejarse, corriendo a una velocidad, que obviamente es menor que la de la ambulancia, pero el caso es que se está alejando de la fuente emisora del sonido, en este caso de la ambulancia.
Como se están alejando, podemos usar la siguiente expresión:
f = (v - v₀ / v) * f₀
Donde:
f: frecuencia percibida por la persona.
v: velocidad de la ambulancia
v₀: velocidad de la persona
f₀: frecuencia emitida por la ambulancia.
Teniendo todos esos valores, solo debemos reemplazar en la expresión:
f = (34 - 1 / 34) * 304
f = (33/34) * 304
<h2>
f = 295.06 Hz</h2>
Espero te ayude
Answer:
B. 2K + Br2 + 2KBr
D. C + 02 → CO2
Explanation:
In balancing a chemical reaction, the number of atoms on both sides of the expression must be the same in order to obey the law of conservation of mass.
According to the law of conservation of mass, in a chemical reaction, matter is neither created nor destroyed.
So, let us investigate:
Number of atoms
Reactants Products
K 2 2
Br 2 2
C + 0₂ → CO₂
C 1 1
O₂ 2 2
We see that for both equations, the number of atoms on both sides of the expression is the same.
Answer:
the cannonball’s velocity parallel to the ground is 86.6m/S
Explanation:
Hello! To solve this problem remember that in a parabolic movement the horizontal component X of the velocity of the cannonball is constant while the vertical one varies with constant acceleration.
For this case we must draw the velocity triangle and find the component in X(see atached image).
V= Initial velocity=100M/S
V= Initial velocity=100M/S
Vx=cannonball’s velocity parallel to the ground
Solving for Vx
Vx=Vcos30
Vx=(100m/S)(cos30)=86.6m/s
the cannonball’s velocity parallel to the ground is 86.6m/S
The correct answers are as follows:
<span>1) hydrogenous sediment
2)sand and gravel
3) They rapidly break down at surface temperatures and pressures.</span>
Answer:
0.48 kgm/s
Explanation:
= mass of the particle = 2.43 μg = 2.43 x 10⁻⁶ x 10⁻³ kg = 2.43 x 10⁻⁹ kg
= velocity of the particle = 1.97 x 10⁸ m/s
= momentum of the particle
momentum of the particle is given as
inserting the values
kgm/s
