In an EM wave traveling west, the B field oscillates up and down vertically and has a frequency of 95.0 kHz and an rms strength of 7.35×10−9T . Assume that the wave travels in free space. A) What is the frequency of the electric field?
B) What is the rms strength of the electric field?
C) What is the direction of its oscillation?
a) The electric field oscillates along the horizontal west-east line.
b) The electric field oscillates along the horizontal north-south line.
c) The electric field oscillates vertically.
d) None of the above.

Your starship, the aimless wanderer, lands on the mysterious planet mongo. as chief scientist-engineer, you make the following measurements: a 2.50-kg stone thrown upward from the ground at 14.0 m/s returns to the ground in 5.70 s ; the circumference of mongo at the equator is 2.20×10^5 km ; and there is no appreciable atmosphere on mongo. (a) the starship commander, captain confusion, asks for the following information: what is the mass of mongo? (b) if the aimless wanderer goes into a circular orbit 2.20×10^4 km above the surface of mongo, how many hours will it take the ship to complete one orbit? (c) an unmanned spacecraft is in a circular orbit around the moon, observing the lunar surface from an altitude of 44.0 km . to the dismay of scientists on earth, an electrical fault causes an on-board thruster to fire, decreasing the speed of the spacecraft by 23.0 m/s . if nothing is done to correct its orbit, with what speed (in km/h) will the spacecraft crash into the lunar surface?