Answer:
548.5 Hz
Explanation:
We are given that
Frequency of source=500 Hz
Speed of train=30m/s
Speed of sound in air=339m/s
We have to find the frequency of the bell to an observer riding the train.
The apparent frequency for the listener
Where 
Frequency of source
=Speed of sound
=Speed of source
Using the formula
The apparent frequency of the bell to an observer riding the train=
Hence, the apparent frequency of the bell to an observer riding the train=548.5 Hz
The answer is (1 kilogram) hope it helps and have a great day!
Answer:
<em>The Sun produces energy by the process of nuclear fusion. Nuclear fusion occurs when lighter nuclei combine to produce a larger, heavier nucleus. In the process, energy is released. Nuclear fusion requires very high temperatures and pressures. Nuclear fusion occurs in the core of the Sun when hydrogen atoms combine to form helium atoms.</em>
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<em>Sample Response: The Sun produces energy by the process of nuclear fusion. Nuclear fusion occurs when lighter nuclei combine to produce a larger, heavier nucleus. In the process, energy is released. Nuclear fusion requires very high temperatures and pressures. Nuclear fusion occurs in the core of the Sun when hydrogen atoms combine to form helium atoms</em>
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Answer:
Pretty sure magnetic waves thank me later bro bro
(C)
Explanation:
The circle has a radius r = 0.5 m, which means that its circumference C is
One revolution means that the stopper travels a distance equal to the circumference of the circle so the velocity of the stopper is
