Whistle of an approaching train is shifter, why?
A wire of diameter 0.04 cm and made of steel of density 8000 kg/m^3 is under constant tension of 80 N. What length of this wire should be plucked to cause it to vibrate with a frequency of 840 Hz?
Sound at a distance can be heard distinctly at night than in the day time. Why?
PathshalaNepal.com is a Registered Company of E. Pathshala Pvt Ltd Nepal. Registration number : 289280
© 2020. All right Reversed.E. Pathshala Pvt Ltd