What is PW9?

How do you fix a shower from going cold when turning on a faucet or flushing a toilet? What is a sentence with the word compile? Can you drill the lock of a coke machine to open it? When is it better to call by value vs. call by reference? What were some of the spectroscopes uses? What determines the polarity of a DC output of a power supply? What are the uses of technology and livelihood education in every day life? How do you untighten a pipe union? Discuss how bipolar junction transistor used as a voltage amplifier? What are the advantages and disadvantages of deforestation. HTML? What is the program to write route cipher? How is operation analysis related to methods engineering? When was the safety elevator invented? What are some of the issues of nuclear power plants? Is there power plants that don't give off harmful gases? How do you calculate water bill from C programming? Can you use wordpad as compiler? How many MS J-K flip flop are there in each IC 7476? What is proof machining of castings? WAP that initialize an integer and display whether it is single digit two digit three digit or more than three digits?