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

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Wo small variable-thrust jets are actuated to keep the spacecraft angular velocity about the z-axis constant at ? 0 = 1.16 rad/s as the two telescoping booms are extended from r1 = 1.18 m to r2 = 4.69 m at a constant rate over a period of 124 seconds. the small 19-kg experiment modules at the ends of the booms may be treated as particles, and the mass of the rigid booms is negligible. determine the necessary thrust t for each jet as a function of time where t = 0 is the time when the telescoping action is begun. after you have the general expression for t, answer the questions. show work.

If we decrease the time it takes for a car to travel over the same distance this will