How Do We Know the Total Mass of the Milky

question 5

Multiple Choice

How do we know the total mass of the Milky Way Galaxy that is contained within the Sun's orbital path?

• A)by counting the number of stars visible in this region of the galaxy
• B)by estimating the amount of gas and dust in between the stars
• C)by using the law of conservation of angular momentum to calculate the orbital speeds of nearby stars
• D)by applying Newton's version of Kepler's third law to the orbits of the Sun or other nearby stars around the center of the Galaxy

Distinguish between different types of chemical nomenclature and common names for compounds.

Understand the safety and procedural norms in handling chemicals, including not using taste as a method of identification.

Identify the role of coefficients and subscripts in chemical equations and their importance in maintaining the balance of reactions.

Understand the structure and development stages of echinoderms, including their movement mechanisms from larvae to adult forms.

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Definitions:

Frequency

In a general context, the rate at which something occurs or is repeated over a particular period of time.

Urination System

The body's system responsible for the production, storage, and expulsion of urine, comprising organs like the kidneys, bladder, and urethra.

Peristaltic Waves

Sequential muscle contractions that occur in the alimentary canal, moving food through the digestive system.

Ureters

Tubes that carry urine from the kidneys to the bladder in the urinary system.