If you treat a 14 × eyepiece of a microscope as a magnifying glass that produces an image at infinity, what is its focal length? the microscope is designed for an image distance of 172 mm from the objective, and the objective is marked 25 ×. what is its focal length?

Do you agree with scientist’s prediction about the warming of alaska and other polar regions?

Determine the maximum r-value of the polar equation r =3+3 cos 0

Nacidified solution was electrolyzed using copper electrodes. a constant current of 1.18 a caused the anode to lose 0.584 g after 1.52 ✕ 103 s. given that the charge of an electron is 1.6022 ✕ 10−19 c, calculate avogadro's number. assume that copper is oxidized to cu2+ ions.