Which Concept in Newton's Mechanics Provides an Answer to the Question

question 219

Multiple Choice

Which concept in Newton's mechanics provides an answer to the question: Why don't the planets fall into the Sun?

• A) conservation of energy
• B) conservation of mass
• C) conservation of momentum
• D) conservation of angular momentum

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Definitions:

AV Valves

The atrioventricular valves, consisting of the tricuspid and mitral valves, regulate blood flow from the atria to the ventricles in the heart.

Left Ventricle

The chamber of the heart that receives oxygen-rich blood from the left atrium and pumps it out to the body through the aorta.

Ventricular Systole

Ventricular systole is the phase of the cardiac cycle during which the ventricles contract, pumping blood out of the heart and into the circulatory system.

Semilunar Valves

Heart valves located between the ventricles and the major arteries leaving the heart, which prevent the backflow of blood.