Answer
while the earth's orbit is almost circular and little seasonal change arises here from our changing distance from the sun, which of these planets would find its northern hemisphere summer solstice much colder than its southern hemisphere one, due to larger changes in perihelion and aphelion?

a) venus (eccentricity = .007)
b) mars (eccentricity = .093)
c) jupiter (eccentricity = .048)
d) neptune (eccentricity = .010)

State one advantage and one disadvantage of using a plane mirrior as a driving mirrior

Jackson is designing a new heater, and he wants to experiment with different thermally conductive materials. which of these materials would be useful in conducting heat?

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.)