Describe an instance where erosion has occurred. Describe the before and after and how it happened

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 accurately compares concave and convex lenses?

Petroleum contains energy. a. light b. kinetic c. chemical d. mechanical