Which of the following statements regarding the properties of electric and gravitational forces is wrong? both follow the inverse square law. electric forces are attractive or repulsive. gravitational forces are attractive. gravitational force is significantly stronger than the electric force.

The only statement that is false is that states that gravitational force is significantly stronger than the electric force.

Explanation:

If we apply at the same time the Coulomb's Law and Universal Gravitation  Law, to two electrons placed at the same distance (let's say 1m), we will find that the gravitational attraction is completely negiglible respect from the electric force (electrostatic in this case), as it is many orders of magnitude smaller, as it can be seen below:

Fg = G* me² / r² = 6.67 * 10⁻¹¹ m²N/kg² * (9.1 * 10⁻³¹)² kg² / 1 m² = 552* 10⁻⁷³ N

Fe = 9*10⁹N.m²/coul² * (1.6*10⁻¹⁹)² coul² / 1 m² = 23 * 10⁻²⁹ N

the moon affects the earth gravitation ally, causing certain motions of that body and also producing tides in its ocean and atmosphere. the tidal wave in our atmosphere is, however, far too minute to be an effective cause in any known meteorological phenomenon.

explanation:

hi there!

out of the two, (b) precision would be more reasonable.   however, both a and b could be pretty reasonable.

-awesomerepublic   : )