yes/no as to whether each of the following problems will require a sequential circuit for its solution.  Briefly explain your answers.

Delmar's Standard Textbook Of Electricity
7th Edition
ISBN:9781337900348
Author:Stephen L. Herman
Publisher:Stephen L. Herman
Chapter13: Magnetic Induction
Section: Chapter Questions
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yes/no as to whether each of the following problems will require a sequential circuit for its solution.  Briefly explain your answers.

(a)  Output z goes to 1 if input v is 0 after input w has gone through a 0-to-1 transition.

(b)  An alarm sounds if the oven door is opened while the heat is on.

(c)  Output z goes to 0 when exactly two keys in the same row of a keyboard are pressed simultaneously.

(d)  The movement of a spot from left to right over a series of photodetectors triggers an output pulse.  No signal is output for right-to-left movement.

(e)  The output of a circuit is the result of the multiplication of two 2-bit binary numbers.

(f)  Every second, one of eight outputs is randomly chosen to be 1 while the other seven are 0.

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