OMAR

FIND Y" if Y=ln(sec(x)+tan(x))

a sound wave has frequency of 631 Hz in air and a wavelength of 0.54m. what is the temperature of the air? assuming the velocity of sound at 0 degree celcius is 334 m/s. answer in units of celcius.

a car, moving at 100 mi/hr, passes a stationary police car whose siren has a frequency of 500 Hz. what is the frequency change heard by observer in the moving car as he passes the police car? the velocity of sound in air is 343 m/s. ( 1 mi= 1.609 km). ans...

=2/3(4X-2X^2)/2X^2 + 3(3-3X)/3X =(4X^2-2X)/3X^2 + (3-3X)/X =(4X^2-2X+9X-9X^2)/3X^2 = (-5X^2+7X)/3X^2