Asimple microscope consists of two converging lenses (lens 1 is the objective lens, and lens 2 is the eyepiece) a certain distance apart. which of the following statements is true? lens 1 forms an enlarged virtual image and lens 2 forms an enlarged virtual image. lens 1 forms an enlarged real image and lens 2 forms an enlarged virtual image. lens 1 forms an enlarged virtual image and lens 2 forms an enlarged real image. lens 1 forms an enlarged real image and lens 2 forms an enlarged real image.

The desk has a weight of 75 lb and a center of gravity at g. determine the initial acceleration of a desk when the man applies enough force f to overcome the static friction at a and b. also, find the vertical reactions on each of the two legs at a and at b. the coefficients of static and kinetic friction at a and b are ms = 0.5 and mk = 0.2, respectively

Oxygen undergoes an isentropic expansion from 120 degree c and 280 kpa absolute to 140 kpa absolute. determine the final temperature of the oxygen and the amount of work per kg of o_2 produced in the process if it is adiabatic.

Certain bacteria (such as aquaspirillum magnetotacticum) tend to swim toward the earth’s geographic north pole because they contain tiny particles, called magnetosomes, that are sensitive to a magnetic field. if a transmission line carrying 100 a is laid underwater, at what range of distances would the magnetic field from this line be great enough to interfere with the migration of these bacteria? (assume that a field less than 5% of the earth’s field would have little effect on the bacteria. take the earth’s field to be 5.0 * 10-5 t, and ignore the effects of the seawater.)