Answers:
a)The balloon is 68 m away of the radar station
b) The direction of the balloon is towards the radar station
Explanation:
We can solve this problem with the Doppler shift equation:
(1)
Where:
is the actual frequency of the sound wave
is the "observed" frequency
is the velocity of sound
is the velocity of the observer, which is stationary
is the velocity of the source, which is the balloon
Isolating :
(2)
(3)
(4) This is the velocity of the balloon, note the negative sign indicates the direction of motion of the balloon: It is moving towards the radar station.
Now that we have the velocity of the balloon (hence its speed, the positive value) and the time () given as data, we can find the distance:
(5)
(6)
Finally:
(8) This is the distance of the balloon from the radar station
Answer:
Simile
Explanation:
Similes are comparisons using the words like or as
The answer would be B. because the object is falling with constant velocity its acceleration is zero .
Answer:
La fuerza hacia arriba que actúa a lo largo de la rampa requerida para evitar que el automóvil ruede por la rampa si el automóvil no tiene frenos es 1703.49 N
Explanation:
La información dada es;
La masa del coche, m = 1000 kg
El ángulo de inclinación de la rampa, θ = 10 °
Observamos que el componente del peso del automóvil que actúa a lo largo de la rampa, , está dado por la relación;
= Masa × Aceleración debido a la gravedad, g × Sin (θ)
= 1000 × 9.81 × Sin(10) = 1703.49 N
Por lo tanto, la fuerza que debe aplicarse para evitar que el vehículo ruede por el plano inclinado es igual al peso del automóvil que actúa a lo largo del plano, que es 1703.49 N en una dirección ascendente a lo largo del plano.