Question 1: Assume you are required to design a logic circuit enclosed in a black box to detect a password, which can be changed by an authorized administrator any time. The password is composed
of a squence of a 4-bit decimal number, i. e., each bit is in the range 'O' to '9' and sent in BCD format.
As stated above, the password should be suitable to change any time, i. e., while the initial password
can be "0120", it can also be replaced by "3456" any time by the administrator. In this design, you are
allowed to use only 4-bit parallel output shift-registers with a single-serial input data line and 4-bit
magnitude comparators. The password to detect is "1234".

unlike the threaded fasteners which are used to clamp the machine members, power screws are used to transmit power. common applications of power screws are: screw jacks: to lift weight. lead screw of lathe: for axial movement of tool and its precise positioning.

answer: copyright is extremely important to authors because it constitutes the ownership of one's original work. having ownership means you can protect your work as intellectual property and control who makes money from it—which is you and those to whom you assign rights.

answer: excel provides a method to add or to remove borders around and between cells. instead of selecting cells first and then formatting, you can choose the formatting tool that you want to use, and then apply the format to one or more cells.

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answer:

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Explanation: