Is a bird sitting motionless on a perch, balanced or unbalanced?
1 answer:
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Answer:
Distance of the object is 8.6 m
Explanation:
As we know that the speed of sound at t degree C is given as
here we know that the temperature is
t = 20 degree C
so we have
now we know that bat heard the echo of sound in 0.05 s
so the to and fro distance of the object is d + d = 2d
so we have
Impuls I is given by:
where
is the change in momentum, 
is the average force and t is the time.
Solve the equation for the force F:
Energy should be conserved, so the velocities will be:
Combining both equations:
where
where
Solve the equation for the force F:
Energy should be conserved, so the velocities will be:
Combining both equations:
where