Balance the following chemical equation: H3PO4 + HCl → PC15 + H20
1 answer:
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Answer:
993.52 Hz
Explanation:
The frequency of sound emitted by the stationery train is 1057 Hz.
The car travels away from the train at 20.6 m/s.
The frequency the observer hears is given by the formula:
where v = velocity of sound = 343 m/s
vo = velocity of observer
f = frequency from source
This phenomenon is known as Doppler's effect.
Therefore:
The frequency heard by the observer is 993.52 Hz.
Answer:
Option B
Change in entropy of the process is
Explanation:
The entropy of a system is a measure of the degree of disorderliness of the system.
The entropy of a system moving from process 1 to 2 is given as
recall from first law,
hence we have,
since the process is isothermal,
this gives us
integrating within the limits of 1 and 2, will give us
also from ideal gas laws,
hence we have
This makes the correct option B