Which factor makes the mesosphere difficult to study? it is too high for weather balloons it is too high for satellites to observe cloud cover makes it too hard to see the ozone layer blocks our view science

The two required components for a generator are

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.)

What happens when the vapor pressure of a liquid is equal to the external pressure?