What is a tool used to hold two objects together?

What is the temperature in a substance with a large amount of thermal energy? How does a convection cell create wind? Can you interchange the roller ballpoint refill with a fineliner refill in a montblanc twist ball pen? True or false Rolling a cart up a ramp is an example of doing negative work? Which learning principle was applied most? Why do both sides of a magnet stick to the fridge but not to each other? What kind of system multiplies by transmitting pressure to another part of a contained fluid? An incident ray that passes through the focal point of a convex lens see the picture? Why does your hand hurt if you hit a wall? What is the region of a longitudinal wave in which the density and pressure are less than normal? What are the bubbles in sprite called? Why does metal heat up fast? How does glass blowing work? Definition of quiet zone of antenna measurement? How would doubling mass of an object affect its height? What is the term for an object's tendency to resist changes in motion? Which subatomic particle is responsibe for electricity? What is an example of an action the does no work? When you pull on a window shade you exert? What is tornado made of?

What is a tool used to hold two objects together?