(c) Fig. 10.2 shows a fire-alarm circuit. The circuit is designed to close switch S and ring bell B if there is a fire.
relay coil
9.0V
Fig. 10.2
Explain the operation of the circuit.

Is the orthocenter of a triangle on the inside ?

Rectangle leg this 11feet and perimeter of 38feet what is the width of the rectangle in feet

Suppose you just purchased a digital music player and have put 8 tracks on it. after listening to them you decide that you like 4 of the songs. with the random feature on your player, each of the 8 songs is played once in random order. find the probability that among the first two songs played (a) you like both of them. would this be unusual? (b) you like neither of them. (c) you like exactly one of them. (d) redo () if a song can be replayed before all 8 songs are played.