What energy is a person lifting a chair?

Is a trebuchet a Force Magnifier or a Distance Magnifier? Where do people get their energy from? How does a tornado move or acquire energy? How much force is needed to keep a 20 N stone from falling? How much energy must be added to a 1 kg piece of glass with a specific heat of 644 J kgC to increase its temperature from 20 C to 100 C? Where does some of your energy come from? 3 things that can produce electricity? How much work is performed when 500 lb of force is applied over a distance of 6 feet? What happens when tornadoes combine? What is a 200nm ultraviolet photon? Why is crude oil considered a non-renewable energy resource? What happens to an objects density when mass is the same and volume is less? How a magnetic field is produced? What would you expect to happen to a a balloon filled with air if it was put into a refrigerator? Why shouldnt the microscope be focused by moving the objectives and the slide closer together? What is speed of flatbed plotter? How the atomic model changed over time? How many grams does a regular piece of paper weigh? What is the difference between a small momentum and a large momentum? When you shout into a cave and the sound comes back to you this is an example of?

What energy is a person lifting a chair?