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N76 [4]
3 years ago
7

The Doppler shift involves a shift in the ___________________. Check all that apply. Group of answer choices actual intensity pr

oduced by the source of sound actual frequency produced by the source of sound the perceived pitch of sound observed by a listener the loudness of sound observed by a listener none of these
Physics
1 answer:
kifflom [539]3 years ago
4 0

Answer:

actual frequency produced by the source of sound

Explanation:

According to Oxford dictionary; Doppler effect is"an increase (or decrease) in the frequency of sound, light, or other waves as the source and observer move towards (or away from) each other."

The actual change in frequency of a wave is called the Doppler shift. The Doppler shift is caused by a constant relative motion between the source of the wave and the observer. This leads to a change in the observed frequency of the wave.

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If your body is dehydrated, the control center in the brain will stimulate the release of a hormone which causes the reabsorptio
Yanka [14]

Answer:

It is an example of negative feedback mechanism

Explanation:

Negative feedback mechanism is the process by which the output of a system, process or mechanism is fed back into the input in order to reduce the error in the system.

In the system described in this question, the reabsorption of water is the output, a feedback signal is sent to the control center, which is the input in order to control the release of the hormone responsible for reabsorption of water into the blood.

7 0
4 years ago
Will an object with a density of 1.05 g/ml float or sink in water? Explain.
WINSTONCH [101]
It will sink because it is heavier. The density of water 1.00 g/ml
7 0
3 years ago
Cyclist always bends when moving the direction opposite to the wind. Give reasons​
Nuetrik [128]
When he bends he kinda off his feet and light but if it’s not i’m so sorry this is just my thinking.
6 0
3 years ago
A bullet can travel at a speed of over 1000 m/s. When a bullet is fired from a rifle, the actual firing makes a distinctive soun
slamgirl [31]

Explanation:

When a bullet is fired from a rifle, the actual firing makes a distinctive sound, but people at a distance may hear a second because the bullet creates a shock wave , a little sonic boom( speed of this sonic boom is greater than the speed of sound). It is this sound only that is heard by the people at a distance from the gun.

7 0
3 years ago
Rank the pressures from highest to lowest:
n200080 [17]

Answer:

P₃ > P₁ > P₂

Explanation:

To rank pressure of the given situation

a) we know

  Pressure at height h below

      P = ρ g h

density of salt water, ρ = 1029 kg/m³

      P₁ = 1029 x 10 x 0.2

      P₁ = 2058 Pa

b) density of fresh water, ρ = 1000 kg/m³

      P₂ = 1000 x 10 x 0.2

      P₂ = 2000 Pa

c) density of mercury, ρ = 13593 kg/m³

      P₃ = 13593 x 10 x 0.05

      P₃ = 6796.5 Pa

Rank of Pressures from highest to lowest

        P₃ > P₁ > P₂

3 0
3 years ago
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