Gold can be found in native or pure state in nature, why

Agas is contained in a vertical, frictionless piston–cylinder device. the piston has a mass of 3.2 kg and a cross-sectional area of 35 cm2. a compressed spring above the piston exerts a force of 190 n on the piston. if the atmospheric pressure is 95 kpa, determine the pressure inside the cylinder.

Which atomic model was proposed as a result of j. j. thomson’s work?

At what time will the interfering waves have an amplitudeof zero?