Question

Is T 2 a power signal?

Answer 1

To calculate the energy of a continuous signal you use the equation:

E∞=∫−∞∞|x(t)|2dt

and for the power:

P∞=limT→∞12T∫−TT|x(t)|2dt

If your signal has finite power (0<P<∞) then it's a power signal. If the signal has finite energy then it's an energy signal (Notice that a signal can be neither type but can't be an energy and a power signal at the same time).