Definition of the 6 simple machines?

What are disadvantages of concurrency control? Why is there a reddish liquid seeping out of your leg after you accidentally scraped it on the ground? What is l and r in vba? What is the difference between digital and analog signals in tabular form? Input type for textarea in HTML? Why is it important for business managers to have a basic understanding of the systems development process? The sum of 38 and 51? How do you get the coin out of the drain pipe on ratatatoullie? What is a bulking factor in relation to excavation? How do you get rid of faecal loading? What is the opposite of inventor? What do you mean by arrays and explain how to create and initialize arrays in C? Have you ever done this type of job before in asked in an interview? What is the study of piloting called? Define voltage in electrical? What does 'I am heading home' mean? How many barrels of oil does the world consume per day? How is led connected? What is the function of the wires in a bulb? How do you use text as a stimulus?