What is adjustable resistor?

Do all simple machines either reduce the input force or increase the distance over which work is performed? What is Agricultural Extension? What does 4th stage cancer mean when it is between food pipe and windpipe? How do you solder an integrated circuit without causing any damage? What is density of sand cement crushed sand and metal? What are the Bending moment diagram for simply supported beam with udl? The origin of barrier voltage at the junction? What is the turns ratio of a transformer with a primary current of 25 mA and a secondary current of 300 mA? How often must the competent person inspect hoisting machinery? Can a house have concrete flooring on the second floor? How can you make a button not to work after it has performed it's duty in visual basics? Can anybody provide you the real example of parallel execution of sequential programs in multi-core architecture? What are different types of body language? What two metals is pewter mainly made up of? Why is a Java Download so important? What term best defined as to assemble for public purpose? Why alternating current is represented by sinusoidal wave form? Who was the native new yorker who invented the elevator on 1850? What is the absolute machine code? What was built on either side of the staircase of the ziggurat to make it stronger?