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Over [174]
4 years ago
7

The doppler effect is the change in observed frequency due to

Physics
1 answer:
Serga [27]4 years ago
4 0

Answer: relative motion between observer and the sound source.

Explanation: The Doppler effect states that when there is a relative motion between an observer and a sound source the frequency of sound perceived by the observer is different in frequency from the original from the source.

The mathematical back up for this claim is given below.

f' = (v+v') /(v-vs) × f

Where f' = observed frequency

v = speed of sound in air

v' = velocity of observer

vs = velocity of source

f = frequency of sound source.

From the formulae, it can be seen that a change in the value of the velocity of observer (v') and source (vs) produces different value of observed frequency (f').

Note, frequency of sound (f) is a constant.

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Citrus × sinensis, orange, orange or sweet orange, is a fruit tree of the genus Citrus, which is part of the family of rutáceas. It is a medium-sized tree -even in optimum growing conditions up to 13 m in height-, perennial, with a large, round or pyramidal crown, with oval leaves between 7 and 10 cm wide and often stipulated and branches sometimes with large spines (more than 10 cm).

 Its white flowers, called azahar, are born isolated or in clusters and are extremely fragrant. Its fruit is sweet orange.

 Answer:
 azahar

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3 years ago
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Which of the following is the most appropriate unit to describe the time you can drive a car based on the amount of gas?
vredina [299]
The answer is A. Minutes per gallon, because the independent quantity is the gallons
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3 years ago
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Pluto has been reassigned and is now a dwarf planet. Why did scientists think this reassignment was necessary? If you were a sci
never [62]
Pluto was discovered by the astronomer Clyde Tombaugh in February 1930. It was given the status of the ninth planet of the solar system.
As telescopes, particularly in on satellites, improved, more objects were discovered which caused a problem that they were quite small and some astronomers didn't think they qualified as being planets.
The International Astronomical Union (IAU) had a vote which was very close. They defined three criteria which a planet must satisfy.
It must be large enough for gravity to overcome structures of materials and make it spherical. Most bodies are flattened spheroids due to rotation.
It must orbit the Sun.
It must have cleared its orbit of other bodies other than moons.
The IAU created a new definition of an object called a dwarf planet which only satisfies the first two criteria. Pluto fails the third criterion, so it was demoted to a dwarf planet.
Many people, including myself, still consider Pluto to be the ninth planet.
To be pedantic, Jupiter has a lot of asteroids in its orbit at its two Lagrange points. They are called trojan asteroids. So, this means that Jupiter fails the IAU's third criterion and should be a dwarf planet, which it is certainly not!
7 0
3 years ago
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Solve these questions plz ​
8090 [49]

Answer:

For the First answer I cant answer it But I can help you :  

The solid has constituent particles tightly packed and the lattice vibrations are carried out by them in their fixed position however oscillations take place about their mean position. These vibrations are increased as soon as there is increase in the temperature which eventually leads to the more chaotic motion of the constituents. At a fixed critical point of temperature, the bonds are broken and the constituent particles are spaced apart changing their phase into liquid. When more temperature is increased by gaining heat energy then the liquid changes into gas where the motion of constituent particles moving freely is dominant.

Explanation:

6 0
3 years ago
2. A 200.0-kg bear grasping a vertical tree slides down at constant velocity. What is the friction force between the tree and th
Neporo4naja [7]

Answer: 1960 N

Explanation:

The bear is sliding down at constant velocity: this means that its acceleration is zero, so the net force is also zero, according to Newton's second law:

F_{net}=ma=0

There are two forces acting on the bear: its weight W, pulling downward, and the frictional force Ff, pulling upward. Therefore, the net force is given by the difference between the two forces:

F_{net}=W-F_f=0

From the previous equation, we find that the frictional force is equal to the weight of the bear:

F_f=W=mg=(200.0 kg)(9.8 m/s^2)=1960 N


8 0
3 years ago
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