If `X=8.00 +-0.04 cm` and `Y=4.00 +- 0.04 cm` then `X/Y` should be expressed as

(a) writ the expression for y as a function of x and t for a sinusoidal wave travelling along a rope in the neagative x direction with the folllowing characteristics: A =8.00 cm , delta=80.0 cm,f=3.00 Hz , and y(0,t)=0 at t=0 , (b) write an expression for y as a function of x and t for the wave in part (a) assuming that y(x,0)=0 at the point x=10.0 cm.

0.4 x + 0.3 y = 1.7 , 0.7 x - 0.2 y = 0.8

If x^(2)=0.4, then x is a :

0.4 xx 0.4 xx 0.4 = ?

The equation of a standing wave, produced on a string fixed at both ends, is y = (0.4 cm) sin[(0.314 cm^-1) x] cos[(600pis^-1)t] What could be the smallest length of the string ?

Two sinusoidal waves in a string are defined by the function y_(1)=(2.00 cm) sin (20.0x-32.0t) and y_(2)=(2.00 cm) sin (25.0x-40.0t) where y_(1), y_(2) and x are in centimetres and t is in seconds. (a). What is the phase difference between these two waves at the point x=5.00 cm at t=2.00 s ? (b) what is the positive x value closest to the original for which the two phase differ by +_ pi at t=2.00 s? (That os a location where the two waves add to zero.)

0.4 sq.cm is____sq. km