<span>a wave in a spring and a P wave are longitudinal waves. Both waves have compression and rarefaction
I hope this helps!
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Answer:
2.62 m
Explanation:
Let the small child sit at a distance x from the pivot.
The distance of big child from the pivot is 4 - x .
By using the concept of moments.
Clockwise moments = anticlockwise moments
27 x = 51 ( 4 - x )
27 x = 204 - 51 x
78 x = 204
x = 2.62 m
Answer:
(none of the options is correct... see below)
Explanation:
Recall that frequency, wavelength and speed are related by
Velocity (i.e speed) = frequency x wavelength
in our case
Speed = 270 Hz x 60m = 16,200 m/s
The correct answer is
C. reduce the friction between its moving parts
In fact, by reducing the friction between the moving parts of the machine, it is possible to reduce the energy wasted due to this friction; therefore, more input energy is converted into useful work, and this will improve the efficiency of the machine.