For a diverging lens with one flat surface, the radius of curvature for the curved surface is 8 cm. what must the index of refraction be so that the focal length is -15 cm? a) 1.1632 b) 1.56 c) 1.35088 d) 1.18 e) 1.533

Blank liquids and gases exert a buoyant force on objects placed in them

Uppose we consider the system of the three capacitors as a single "equivalent" capacitor. given the charges of the three individual capacitors calculated in the previous part, find the total charge qtot for this equivalent capacitor. express your answer in terms of v and c.

Atank has a shape of a cone with a radius at the top of 2 m and a height of 5 m. the tank also has a 1 m spout at the top of the tank. the tank is filled with water up to a height of 2 m. find the work needed to pump all the water out the top of the spout. (use 9.8 m/s2 for g and the fact that the density of water is 1000 kg/m3.)