Answer: The sun and Earth exert gravitational forces on each other, but the magnitude of the force depends on their masses and the distance between them. Since the mass of the sun is much greater than the mass of Earth, it exerts a stronger gravitational force on Earth than Earth exerts on the sun. However, both objects are in motion around a common center of mass, which means that they both experience an acceleration towards each other.
The strong force and the weak force are two of the fundamental forces in nature that govern the behavior of subatomic particles. The strong force is responsible for holding the nucleus of an atom together, despite the repulsive force between its positively charged protons. This force is considered strong because it can overcome the repulsive force and bind the protons together. The strong force is also responsible for the energy released in nuclear reactions.
The weak force, on the other hand, is responsible for the decay of subatomic particles, such as beta decay. This force is considered weak because it has a short range and its effects are only observed at the subatomic level. The weak force is also responsible for the fusion reactions that power the sun and other stars.
Overall, these four fundamental forces play critical roles in the behavior of matter and energy in the universe, from the subatomic level to the largest structures in the cosmos