How does an electromagnetic wave propagate itself?

a.
a changing magnetic field induces an electric field perpendicular to the magnetic field.
b.
a changing electric field induces a magnetic field perpendicular to the electric field.
c.
changing electric and magnetic fields produce a transverse wave that is perpendicular to both of the oscillating fields.
d.
all of the above

an ion is a charged atom or molecule. it is charged because the number of electrons do not equal the number of protons in the atom or molecule. an atom can acquire a positive charge or a negative charge depending on whether the number of electrons in an atom is greater or less then the number of protons in the atom.

a person with a mass of 106kg has a weight of 1060n

not too sure thinking all accelerations are pointed down

when jerome paddle in flowing river towards east the net speed of jerome will increase

so the net speed of jerome will be given as

now the speed of paul will be same as it is given as he is running on the ground

so

so here we can say since the speed of jerome is more so he will win the race

now as we know the distance so the time difference is given as

so jerome will reach first and the time difference will be 203.55 s or 3.4 min