A communications system features a channel containing additive white Gaussian noise. This white noise, band-limited to 0-10MHz, is passed through a perfectly rectangular filter of bandwidth 18 kHz, gain 3dB, and center frequency 455 kHz. If the original white noise has a normalized average power of 4W, what is the noise power after it has been passed through the filter?

Amicroscope, because these cells are so small that you would not be able to see them, or what they attack without it.

The boat's velocity relative to the riverbank can be resolved into two components. the component going north is 2.7 m/s and the component going west is 1.2 m/s.we add these two vectors and then find the magnitude of the resultant to get the speed.the magnitude of the resultant vector from adding can be obtained by the pythagorean theorem.    to two significant figures, the boat's speed relative to the riverbank is 3.0 m/s.