Answer:
wavelength.
Explanation:
One complete expression of a waveform beginning at a certain point, progressing through the zero line to the wave’s highest (crest) and lowest (trough) points, and returning to the same value as the starting point is called a is called wavelength. Its can be also defined as the distance between two successive crests or trough points in wave form.
Mechanical advantage is a measure of the force amplification achieved by using a tool, mechanical device or machine system.
now here we can say that mechanical advantage is given as
here we know that
output force = 156 N
input force = 52 N
so we will have
so here mechanical advantage is 3
Nevermind that one i dont know sorry
Answer:
The speed of the ambulance is 4.66 m/s.
Explanation:
Given that,
The siren emitting a whine at 1570 Hz
The cyclist pedaling a bike at 2.45 m/s
The cyclist hears a frequency of 1560 Hz
We know that,
Speed of sound wave
We calculate the speed of the ambulance
Using Doppler effect,
Where,
= frequency of ambulance siren
= cyclist hears the frequency
=speed of source
= speed of observer
Put the value in to the formula
Hence, The speed of the ambulance is 4.66 m/s.