As you stand near a railroad track, a train passes by at a speed of 31.7 m/s while sounding its horn at a frequency of 218 Hz. W
1 answer:
Explanation:
Given that,
Frequency of train horn, f = 218 Hz
Speed of train,
The speed of sound, V = 344 m/s (say)
The speed of the observed person,
(a) When the train approaches you, the Doppler's effect gives the frequency as follows :
(b) When the train moves away from you, the Doppler's effect gives the frequency as follows :
Hence, this is the required solution.
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Answer:
Explanation:
The definition of angular velocity is as follows:
where is the angular velocity, and
is the frequency.
Frequency can also be represented as:
where is the period, (the time it takes to conclude a cycle)
with this, the angular velocity is:
The period T of rotation around the sun 365 days, thus, the angular velocity:
if we want the angular velocity in rad/second, we need to convert the 365 days to seconds:
Firt conveting to hous
then to minutes
and finally to seconds
thus, angular velocity in rad/second is:
Answer:
Explanation:
Let consider the observer as an inertial reference frame. The object is modelled after the Principle of Momentum Conservation:
The speed of the more massive piece is:
The kinetic energy added to the system is: