If Our Estimates of the Number of Comets in Every

question 41

Multiple Choice

If our estimates of the number of comets in every part of the solar system are correct, the total mass contained in comets must be:

• A) about the mass of Ceres, the largest asteroid
• B) about the mass of the Earth
• C) about the mass of the Moon
• D) on the order of the mass of all the planets put together
• E) since comets are mostly vapor, their total mass is less than that of the moons of Mars

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Definitions:

Thermal Energy

The internal energy present in a system due to its temperature.

Chemical Energy

A form of potential energy stored in the bonds of chemical compounds, released or absorbed during chemical reactions.

Glial Cells

Non-neuronal cells in the central nervous system that support, protect, and nourish neurons, playing key roles in neural health and function.

Pain Perception

The individual's experience and interpretation of pain, which involves sensory, emotional, and cognitive components and can vary widely among individuals.