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marysya [2.9K]
3 years ago
15

Giving lots of points

Physics
2 answers:
bekas [8.4K]3 years ago
5 0

Answer:

wind turbine

Explanation:

antiseptic1488 [7]3 years ago
4 0

Answer:

g wind turbine

Explanation:

look up the song dancing in the sky

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A speaker at the front of a room and an identical speaker at the rear of the room are being driven at 456 Hz by the same sound s
vampirchik [111]

Answer:

2.97795 Hz

Explanation:

v = Speed of sound in air = 343 m/s

v_r = Relative speed between the speakers and the student = 1.12 m/s

f' = Actual frequency of sound = 456 Hz

Frequency of sound heard as the student moves away from one speaker

f_1=f'\dfrac{v-v_r}{v}\\\Rightarrow f_1=456\dfrac{343-1.12}{343}\\\Rightarrow f_1=454.51102\ Hz

Frequency of sound heard as the student moves closer to the other speaker

f_2=f'\dfrac{v+v_r}{v}\\\Rightarrow f_2=456\dfrac{343+1.12}{343}\\\Rightarrow f_2=457.48897\ Hz

The difference in the frequencies is

f_2-f_1=457.48897-454.51102=2.97795\ Hz

The student hears 2.97795 Hz

6 0
3 years ago
Kiley went 5.7 km/h north and then went 5.8 km/h west. From start to finish, she went 8.1 km/h northwest.
avanturin [10]
5.7 km/h north and 5.8 km/h west are instantaneous velocities, while 8.1 km/h northwest is the average velocity.<span>

The answer choice above is correct.

The instantaneous velocities are the actual </span>velocities while traveling ( the velocity during that instant ). The average velocity is the average of the instantaneous velocities ( the speed in one direction equivalent to the two speeds <span>in different directions ).

I used speed in the explanation because velocity is speed with direction.</span>
7 0
3 years ago
Read 2 more answers
Which of the following is not conserved?
ICE Princess25 [194]
B.) acceleration.
hope this helps:)

8 0
3 years ago
PLEASE HELP!!! :(
Brilliant_brown [7]
The answer is
<span>C. -2 because I am god</span>
3 0
3 years ago
Which of the following equations defines the law of conservation of energy?
Blababa [14]

Answer:

Total energy =kinetic energy +potential energy.

7 0
3 years ago
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