What is something that weighs 2.2 pounds?

Why do they use quartz in clocks? Why is it important to have clean surfaces? Marcia has difficulty seeing objects that are far away from herwhat shape should the lenses in her eyeglasses be? How did the inventors of the different thermometers determine their units of measurement? How does the Material it is made from affect the parachute? Heating causes an object to? What happens to light as it strikes different materials? How is electrical energy generated? Does the density of an object tell how massive something is? Why is the gradient on a current-potential difference graph not the resistance? What is the state of rubidium at 25 degrees celsius? What does the energy of the wave pulse depend on? Why is a spectrum of colors not obtained when light passes through a glass slab? Why does an iceberg have more thermal energy than hot water? What percent of France's electricity comes from nuclear power? Which position of the object will produce an image of the same size as the object? What is the control rod in a nuclear reactor? Why is it significant to know that when energy is transformed it is conserved in quantity but not quality? How does carpet help to retain the heat? Which filter transmits red light?

What is something that weighs 2.2 pounds?