It can only be acheived by doung excercises frequently.
Answer:The frequency of the echo is slightly decreased
Explanation:
Given
speed of boat ![=30\ mph](https://tex.z-dn.net/?f=%3D30%5C%20mph)
cliff is
away
when boat is still , suppose t is the time taken by the echo to reach observer on the boat
But as soon as boat starts moving the distance between cliff and boat decreasing and time for echo to reach observer also decreases
and we know ![time \propto \frac{1}{frequency}](https://tex.z-dn.net/?f=time%20%5Cpropto%20%5Cfrac%7B1%7D%7Bfrequency%7D)
therefore frequency of the echo slightly decreased.
Because when your running any experiment there will always be an experimental error so always be ready for it so that you can correct that error in your experiment
Answer:
The fingers of the right hand should point in the direct of the charge.
Explanation: