Consider the following three signals (1) x(t) = sinc(t); (2) y(t) = et sin(f0t)u(t) (3) z(t) = u(t); where the unit step and the sinc functions are de ned as follows: u(t) = ( 1 t > 0 0 else sinc(x) = sin(x) x : (a) Classify them as power or energy signals (b) Compute their energy or power (c) Compute the autocorrelation function of x(t)

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final

A2.00-m long piano wire with a mass per unit length of 12.0 g/m is under a tension of 8.00 kn. what is the frequency of the fundamental mode of vibration of this wire?

The mantle is made up of which structural zones?