What is the function of the governor in a steam engine?
a. controls speed by regulating the amount of steam sent to the engine c. controls the amount of steam released through the safety valve b. regulates the amount of heat sent to the boiler d. regulates the flow of water into the boiler

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.)