How does society use the screw to make life easier?

Difference between shear stress and critically resolved shear stress? Write a c program to add all numbers between 100 and 200 which contain the digit 5 along with steps? What is porcelain tile made out of? How many head pans of gravel in a wheelbarrow? What year was the seesaw invented? What is the most powerfull drill? Does a house that is wired 3 phase for about 50 years need to be rewired by code? What are the limitations to student project work? What is the maximum recommended effective temperature et for full work load in enclosed spaces? Why a memory cards become defective? Can you instantiate an interface? What are the advantages of pseudocode? Which attributes is used with TR tag? Can stack be as a pointer? What did Richard Maddox invent? What is the common transistor configuration used for signal amplifier? Why did george w McGill make the stapler? Can you name the legacy classes and interface for collections? What is the relative cost of materials? What is a canooter valve?