Without friction, air resistance or gravity, conservation of energy suggests that a paper airplane would keep sailing forever. true false

Matter that emits no light at any wavelength is called

Which type of reaction is shown in this energy diagram? energy products activation energy reactants time o a. endothermic, because energy is released to the surroundings o b. exothermic, because energy is absorbed from the surroundings o c. exothermic, because energy is released to the surroundings o d. endothermic, because energy is absorbed from the surroundings

Why should the wavelength scale of spectroscope be calibrated