I honestly think the answer is actually C).
b. False
B.) It includes cosmic rays
C.) It burns and causes lung cancer
D.) It occurs naturally in the environment
Answer:
C.) It burns and causes lung cancer
Explanation:
Answer: The correct answer is option D.
Explanation:
Chemical reactions are defined as the reactions in which rearrangement of one or more substances gets converted to one or more different substances known as products. Energy is released in the reactions where energy of products is less than the energy of the reactants.
Nuclear reactions are the reactions in which atomic nucleus undergoes change and releases a huge amount of energy in the process. There are two types of nuclear reactions: Nuclear fusion and nuclear fission. Both the nuclear reactions releases a huge amount of energy.
From the given information above, we conclude that the correct option is Option D.
The frequency at which the stationary listener will hear the sound of the plane as it approaches is 5.54 KHz
Applying the equation of Doppler effect, the observer's frequency can be obtained as follow:
f₀ = [(v + v₀) / (v – vₛ)]f
f₀ = [(334 + 0) / (334 – 114)] × 3.65
f₀ = [334 / 220] × 3.65
f₀ = 5.54 KHz
Learn more about Doppler effect:
Answer:
Explanation:
velocity of source, Vs = 114 m/s
original frequency, f = 3.65 kHz
velocity of observer , Vo = 0 m/s
velocity of sound, v = 334 m/s
let the frequency is f'.
The formula for the doppler effect is given by
where, v is the velocity of sound.
f' = 5.54 kHz
b. periodic condensations and rarefactions.
c. high- and low-pressure regions.
d. all of the above E. none of the above
Sound waves in air are a series of periodic condensations and rarefactions.
Sound waves in air are a series of periodic condensations and rarefactions. When a sound is produced, it creates compression regions (areas of high pressure) and rarefaction regions (areas of low pressure) that propagate through the air. These alternating regions of high and low pressure create the characteristic waveform of the sound wave.
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