PLEASE HELP! An object is placed at a distance of 18.0 cm to the left of a thin converging lens of focal length 10.0 cm. Where does the image form A) 22.5 cm to the right of the lens
B) 22.5 cm to the left of the lens
C) 8.0 cm to the right of the lens
D) 6.4 cm to the right of the lens

Consider a u-tube whose arms are open to the atmosphere. now equal volumes of water and light oil (ρ = 49.3 lbm/ft3) are poured from different arms. a person blows from the oil side of the u-tube until the contact surface of the two fluids moves to the bottom of the u-tube, and therefore, the liquid levels in the two arms are the same. if the fluid height in each arm is 30 in, determine the gage pressure exerted by the person on the oil by blowing.