4
Every current through a wire produced a magnetic field. And since the magnetic field of Earth is weak, it will get attracted towards the wire.
question 2 answer is ALL OF THE ABOVE
question 3 answer is WARM AND MOIST.
The energy carried by a single photon of frequency f is given by:

where

is the Planck constant. In our problem, the frequency of the photon is

, and by using these numbers we can find the energy of the photon:
force=mass × acceleration
mass=force ÷ acceleration
acceleration=force ÷ mass