The best answer would be C. Amplitude is the measure of the distance between the crest and the center of the line, or the distance between the trough and the center of the line (like wave height). High waves are a sea danger, especially to small ships and rowboats.
The correct answer is that it converts mechanical energy to electrical energy.
Both the effects (l<span>engthening of the transmitted signal's wavelength and decrease in its frequency) indicates that the object is moving away from the observer, and this phenomenon is called Doppler effect.
In fact, when the object is moving away from the observer, the relative distance between two consecutive crests of the wave emitted by the object increases to the observer eyes, since he's moving away. This means that the wavelength appears larger, and since the frequency is inversely proportional to the wavelength, the frequency appears smaller.</span>
Speed and velocity are both measured using the same units. The SI unit of distance and displacement is the meter. The SI unit of time is the second. The SI unit of speed and velocity is the ratio of two — the meter per second.
Source: https://physics.info/velocity/
Hope it helps!
Answer:
a)
b)N= 21.29 rpm
Explanation:
Given that
Mass of the ball =m
Length of string = L
Lets take angular speed = ω
The centripetal force on the ball
F = m ω² L
To complete the circle ,at the top condition the force due to gravity should be equal to the centripetal force
Gravity force = mg
F= mg
m ω² L = m g
ω² L = g
When L= 2 m
Lets take g =10 m/s²
ω = 2.23 rad/s
To convert in rpm
N=Speed in rpm
N= 21.29 rpm
