Answer:
The frequency the motorcyclist hears is 601.60 Hz
Explanation:
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.
The following expression is considered the general case of the Doppler effect:
![f'=f*\frac{v+-vR}{v-+vE}](https://tex.z-dn.net/?f=f%27%3Df%2A%5Cfrac%7Bv%2B-vR%7D%7Bv-%2BvE%7D)
Where:
f ’, f: Frequency perceived by the receiver and frequency emitted by the emitter respectively. Its unit of measurement in the International System (S.I.) is hertz (Hz), which is the inverse unit of the second (1 Hz = 1 s-1)
v: propagation speed of the wave in the medium. It is constant and depends on the characteristics of the medium. In this case, the speed of sound in air is considered to be 34o m / s
vR, vE: Receiver and emitter speed respectively. Your unit of measure in the S.I. is the m / s
±, ∓:
The + sign is used:
- In the numerator if the receiver approaches the sender
.
- In the denominator if the emitter moves away from the receiver
.
The sign - is used:
- In the numerator if the receiver moves away from the sender
.
- In the denominator if the emitter approaches the receiver.
In this case:
- f: 523 Hz:
- v= 340 m/s
- vR= 13.6 m/s
- vE= 32.6 m/s
-
The emitter approaches the receiver, so the + sign is used in the numerator and the - sign is used in the denominator.
Replacing:
![f'=523 Hz*\frac{340 m/s+13.6 m/s}{340 m/s-32.6 m/s}](https://tex.z-dn.net/?f=f%27%3D523%20Hz%2A%5Cfrac%7B340%20m%2Fs%2B13.6%20m%2Fs%7D%7B340%20m%2Fs-32.6%20m%2Fs%7D)
Solving:
![f'=523 Hz*\frac{353.6 m/s}{307.4 m/s}](https://tex.z-dn.net/?f=f%27%3D523%20Hz%2A%5Cfrac%7B353.6%20m%2Fs%7D%7B307.4%20m%2Fs%7D)
f' = 601.60 Hz
<u><em>
The frequency the motorcyclist hears is 601.60 Hz</em></u>
Answer: B
According to Coulomb: Like charges repel each other; unlike charges attract. Thus, two negative or positives charges repel one another, while a positive charge attracts a negative charge.
We see that the only diagram who shows two like charges and their Electromagnetic Forces is B
The frequency of the activity <span />
-- Bob covered a distance of (32m + 45m) = 77 meters.
-- His displacement is the straight-line distance and direction
from his starting point to his ending point.
The straight-line distance is
D = √(32² + 45²)
D = √(1,024 + 2,025)
D = √3,049 = 55.22 meters
The direction is the angle whose tangent is (32/45) south of east.
tan⁻¹(32/45) = tan⁻¹(0.7111...) = 35.42° south of east.
Answer:
Fusion power is a proposed form of power generation that would generate electricity by using heat from nuclear fusion reactions. In a fusion process, two lighter atomic nuclei combine to form a heavier nucleus, while releasing energy. Devices designed to harness this energy are known as fusion reactors.
Explanation: