What Makes Gravity the Main Force Determining the Large-Scale Structure

question 193

Multiple Choice

What makes gravity the main force determining the large-scale structure of the universe?

• A) Gravity is the strongest of the four fundamental forces.
• B) Gravity is the only force that has an infinite range.
• C) While the electromagnetic force of a charged particle has an infinite range, it is usually screened (and limited) by the existence of charges of the opposite sign. Ordinary matter has only one sign and therefore does not screen other gravitational forces.
• D) The gravitational force, while short-ranged, is the only force that affects all particles: photons, quarks, changed particles, uncharged particles.

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Definitions:

Erythrocyte Production

The process by which new red blood cells (erythrocytes) are generated, primarily occurring in the bone marrow, known medically as erythropoiesis.

Minerals

Inorganic substances required by the body in small amounts for a variety of functions, including building strong bones and teeth, and regulating metabolism.

Buffers

Substances that minimize changes in pH by absorbing or releasing hydrogen ions in a solution.

Enzymes

Biological catalysts that speed up chemical reactions in living organisms by lowering the activation energy, involved in processes such as digestion and metabolism.