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Mohak Tandon Asks – “
“Is the acceleration due to gravity different in south pole and north pole?”
As per theory, acceleration due to gravity changes with altitude, depth and latitude.
If we consider that the variation of g with latitude is caused by rotation of earth only, then the value of g will be same for both north pole and south pole.
But, the change in the value of acceleration due to gravity with latitude is caused by the shape of earth too. So it depends your distance from the centre of earth when you are at north pole or south pole.
For calculations the polar radius is taken same at North as well as south pole. So, value of g can be taken the same for both poles.
I want to ask that does the acceleration due to gravity remains constant within the earth’s atmosphere or does it keep decreasing as we go up from the earth’s surface?
Rashshad Rasheed asked
“What is meant by beats?discuss graphical method for formation of standing waves on streched strings?”
Beats are periodic variation in intensity of sound caused by the superposition of two waves slightly differing in their frequencies. Beats are heard when the difference in frequency is less than 10. (because human ear can distinguish two sounds distinctly only if they differ in time by 0.1 sec.)
Here are some links to understand beats better through interactive animations