Cameras with automatic focus bounce a sonar (sound) beam from the object
being photographed and compute distance
from the time interval between sending and
receiving the signal. Why will these cameras
not focus properly for photographs of
mirror images?

It is reasonable to assume that the bulk modulus of blood is about the same as that of water (2.2 gpa). as one goes deeper and deeper in the ocean, the pressure increases by 10000 pa for every meter below the surface. if a diver goes down 80.0 m in the ocean, by how much does each cubic centimeter of her blood change in volume? give the answer in cubic centimeters (actually one cubic centimeter equals one milliliter).