This is the given equation of vibration of a rectangular drum of Membrane
Q. NO:15
A tuning fork has a frequency of 856H7 ond
amplitude of 0.sem. If the velocity of Sound
is $40mls. calculate the energy curreno.
Density of airis 0.001296gnlee
Ansuleris.
Given,
Frequency (F) = 256H2
amplitude cal=0.5cm

Unpolarized light falls on two polarizer sheets whose transmission axes are at right angles. a third polarizer is placed between the first two so that its axis makes a 52-degree angle with the axis of the first polarizer. a) what fraction of the incident light intensity is transmitted through the first polaroid? b) what fraction of the incident light intensity is transmitted through the second polaroid? c) what is the angle of polarization of the light that enters the third polaroid? d) what fraction of the incident light intensity is transmitted through the third polaroid. e) what happens if the middle polaroid is removed?

Lacie kicks a football from ground level at a velocity of 13.9 m/s and at an angle of 25.0° to the ground. how long will the ball be in the air before it lands? how far will the football travel before it lands?

If anyone who can me with this hw? i would really appreciate it