A 50-cm3 block of wood is floating on water, and a 50-cm3 chunk of iron is totally submerged in the water. Which one has the greater buoyant force on it?
A) the wood
B) the iron
C) Both have the same buoyant force.
D) It cannot be determined without knowing their densities.
Question 2
What is the power of the lens that has a focal length of 40 cm and a diameter if 5.0 cm?
A) +0.20 diopters
B) +2.5 diopters
C) +2.7 diopters
D) +20 diopters
E) -2.5 diopters