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When does an arête form?
Arêtes can form in two ways. They can form when two glaciers erode parallel U-shaped valleys, or they can form when two glacial cirques erode headwards toward one another, although frequently this results in a saddle-shaped pass, called a col.
When two or more materials combine chemically they form what?
When two or more materials combine chemically, they from a substance. When two or more materials combine and they do not react with each other, they form a mixture.
Which subatomic particles account for most of an atoms mass?
The up and down quark accounts for most of an atoms mass. Two up quarks and one down quark forms a proton, and one up quark and two down quarks forms a neutron. Protons and neutrons form the nuclei of atoms, and comprise most of their mass, along with the binding energy holding them all together.
What two advancements in technology were made in the 1920's?
In 1920, one of the most important technological advancements was in the form of a robot invention. Another advancement regarded the invention of the Lie Detector by John Larson.
What is the stronger of the two forces that form ocean tides?
Lunar gravity.
