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Describe the path of a ray that approaches a mirror parallel to the principal axis.
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Wo audio speakers are placed on a vertical rail. speaker a is placed at head-level while speaker b is place at some variable height, \delta yδy, above speaker a. both speakers receive simultaneous input from a sine-wave generator so the speakers each produce a pure sinusoidal sound wave with a wavelength of 0.531 meters. calculate the lowest height that speaker b can be placed above speaker a to produce a minimum of sound heard by person standing \delta x = 7.86δx=7.86 meters directly in front of speaker a.
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What happens to atoms and chemical bonds during a reaction?
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Which of the following is not a part of the respiratory system? a. pharynx b. trachea c. pancreas d. larynx
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Consider a compact car that is being driven
at 98 km/h.
The acceleration of gravity is 9.8 m/...
The acceleration of gravity is 9.8 m/...
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