¿Cuál es el volumen de un cubo de acero si se sabe que su masa es 50 hg, si la densidad del acero es 7850 kg/m3? Exprese el resu
1 answer:
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Answer:
change in frequency is 636 Hz
Explanation:
given data
speed v1 = 36 m/s
speed v2 = 45 m/s
frequency f = 500 Hz
speed of sound s = 343 m/s
to find out
what is the change in frequency
solution
we know here change of frequency formula that is
frequency = (f) ...................1
put here value in equation 1
and we take v2 = -45 because opposite direction
frequency = (f)
frequency = (500)
frequency = 636
so change in frequency is 636 Hz
Answer:
Compression of the spring: 0.18 m (downward)
Explanation:
The forces acting on the block of wood are:
- The force of gravity, acting downward, of magnitude , where m = 5.32 kg is the mass of the block and
is the acceleration due to gravity
- The force exerted by the spring, downward, of magnitude , where
is the spring constant and
is the elongation of the spring
- The buoyant force, upward, of magnitude , where
is the water density and V the volume of the block
Since the block is in equilibrium, the net force is zero, so we can write
(1)
We have to find the volume of the block first. We have:
m = 5.32 kg (mass)
(wood density)
So, the volume is
So now we can re-arrange eq.(1) to find the elongation of the spring, x:
So, the spring is compressed by 0.18 m.