The four fundamental forces are
A) strong force, weak force, electric force, magnetic force.
B) strong force, weak force, electromagnetic force, gravity.
C) nuclear force, electromagnetic force, gravity, tidal force.
D) nuclear force, gravity, tidal force, magnetic force.
Question 2
Io experiences strong internal tidal heating because of
A) large amounts of radioactive decay occurring inside the moon
B) the large amount of internal heat left over from its formation
C) the strong tidal forces exerted by the outer Galilean moons, Europa, Ganymede, and Callisto
D) the strong tidal force from the massive Jupiter combined with its elliptical orbit which causes the strength and direction of the force to constantly change