The function of the circulatory system is to
1 answer:
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Answer:
_s = 37.77 m / s
Explanation:
This is an exercise of the Doppler effect that the change in the frequency of the sound due to the relative speed of the source and the observer, in this case the observer is still and the source is the one that moves closer to the observer, for which relation that describes the process is
f ’= f₀
where d ’= 530 Make
when the ambulance passes away from the observer the relationship is
f ’’ = f₀
where d ’’ = 424 beam
let's write the two expressions
f ’ (v-v_s) = fo v
f ’’ (v + v_s) = fo v
let's solve the system, subtract the two equations
v (f ’- f’ ’) - v_s (f’ + f ’’) = 0
v_s = v
the speed of sound is v = 340 m / s
let's calculate
v_s = 340
v_s = 340 )
v_s = 37.77 m / s
Answer:
The value of torque on the rod is = 3.94 N - m
Explanation:
mass = 50 kg
Radius = 0.5 m
Moment of inertia ( I ) =
I = 6.25 kg-
Angular velocity = 120
= 12.6
Δ = No. of rev × 2
Δ = 20 × 2
Δ = 126 rad
From work energy theorem
Work done is equal to change in kinetic energy.
-------- (1)
Where A & B represents the initial & final states.
Since = 0
496 J
We know that
T Δ
Where work done
T = torque applied on the rod
Δ = Angular displacement of the rod.
496 = T × 126
T = 3.94 N - m
Therefore the value of torque on the rod is = 3.94 N - m