You decided to change your bedroom. You move your bed 1.5 meters across the room and the force you used to move the bed was 20 newtons. It takes you 5 minutes. How much power did you use?

What reaction is taking place? 02 + c3h8 = h20 + co2

Which process does not require the presence of a physical substance in order to transfer heat? air in the atmosphere is heated by the ground. this warm air then rises, and cooler air falls. this is an example of what type of process? how is conduction different from radiation?

Which theory was contradicted by experiments with the photoelectric effect? light spreads out after it passes through a small opening. as soon as light strikes metal, electrons will be ejected. visible light, regardless of color, will cause the ejection of electrons when striking metal. the kinetic energy of ejected electrons depends on the frequency of light that strikes the metal.