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Visible light, with a frequency of 6.0 *1014 Hz, is reflected from a spaceship moving directly away at a speed of 0.90c.The frequency of the reflected waves observed at the source is:
Food
Nutritious substances that living organisms eat or drink to maintain life and growth.
Water
A tasteless, odorless, and transparent liquid that forms the world's streams, lakes, oceans, and rain and is necessary for all known forms of life.
Gate Control
Refers to the gate control theory of pain which posits that pain signals pass through neural "gates" in the spinal cord and can be modulated by other neural signals.
Theory of Pain
A conceptual framework for understanding the mechanisms of pain perception, processing, and the experience of pain.
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