To determine whether Earth's tidal bulges would increase or decrease in different situations, we need to consider the factors that influence tide forces. The size of tidal bulges is primarily affected by gravitational forces exerted by the Moon and the Sun. In addition, there are other factors like the Earth's rotation and shape. Based on these factors, we can analyze the following situations:
Increase in the Moon's gravitational force: If the Moon's gravitational force increased, the size of Earth's tidal bulges would also increase. This is because the Moon's gravitational force is a major driver of the tidal forces on Earth. With a stronger gravitational force, the Moon would exert a greater pull on Earth's oceans, resulting in larger tidal bulges.
Increase in the Sun's gravitational force: Similarly, if the Sun's gravitational force increased, the size of Earth's tidal bulges would also increase. While the Sun's gravitational force is weaker than the Moon's, it still contributes to Earth's tidal forces. A stronger gravitational force from the Sun would lead to larger tidal bulges.
Decrease in Earth's rotational speed: If Earth's rotational speed decreased, the size of Earth's tidal bulges would increase. Slower rotation would allow more time for the Moon and Sun's gravitational forces to act on Earth's oceans. This would result in larger tide bulges.
Changes in Earth's shape: Alterations in the Earth's shape, such as the flattening or bulging of its poles or changes in its landmass distribution, can impact the size of tidal bulges. However, these changes are relatively small compared to the Moon and Sun's gravitational forces. Therefore, while changes in Earth's shape might have some effect, they would likely be minimal compared to the other factors mentioned.
It's imperative to note that the interplay of these factors is complex. Predicting the precise impact of tidal bulges requires detailed calculations and simulations. Nevertheless, in general, an increase in the gravitational forces of the Moon and the Sun or a decrease in Earth's rotational speed would likely lead to larger tidal bulges.