In this diagram, which force is represted by L? a. the force caused by the wings encoutering wind and air

b. the force caused by a draft of wind

c. the reaction force of wind and air that is pushed out of the way

d. the force that exists in reaction to gravity or weight

Avertical clean glass piezometer tube has an inside diameter of d = 1 mm and is used to measure pressure in a horizontal pipe carrying water as shown. due to pressure in the pipe, the water at 20c rises into the tube to a height h. if the water pressure in the pipe is p = 500 pa gauge, estimate the height h: (a) without considering surface tension (b) with surface tension (capillary) effects. the contact angle  can be assumed at 30 deg

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

Ascientist notices that an oil slick floating on water when viewed from above has many different colors reflecting off the surface, making it look rainbow-like (an effect known as iridescence). she aims a spectrometer at a particular spot and measures the wavelength to be 750 nm (in air). the index of refraction of water is 1.3