Yellowstone Caldera
One is supernova one is avalanche but I don't know the rest yet :-)
center forces and gravitational forces
The forces between ions in crystals are ionic bonds. These bonds are stronger and are a much more extreme version of electron sharing between metal atoms and nonmetal atoms. London forces and dipole-dipole forces are attractive forces that occur between covalently bonded nonmetal atoms.
Electrical forces act between separated charges.
all such forces are intermolecular forces.
Adhesive forces are the attraction between different substances, while cohesive forces are the attraction between molecules of the same substance.
Cohesive force is the attractive force between like molecules. Cohesive forces are also known as intermolecular forces and can also be repulsion forces.
The forces between molecules in steam are weaker than the forces between molecules in liquid water. In steam, molecules are far apart and move freely, resulting in weak intermolecular forces. In liquid water, molecules are closer together and have stronger intermolecular forces due to hydrogen bonding.
There are four fundamental forces in nature, the strong, electromagnetic, the weak and gravitational. All forces between particles can be traced back to these.
The resultant of two forces is affected by the angle between the forces through vector addition. When the forces are pointing in the same direction (angle is 0 degrees), the resultant will be the sum of the two forces. As the angle between the forces increases, the magnitude of the resultant decreases until at 90 degrees, the forces are perpendicular and the resultant is the square root of the sum of the squares of the two forces.
Forces occur due to interactions between objects. They can result from contact between objects (contact forces) or from the attraction or repulsion between objects without direct contact (field forces such as gravity or magnetism). Forces cause objects to accelerate, decelerate, or change direction.
They are the forces of repulsion.