Two small speakers emit sound waves of different frequencies equally in all directions. Speaker A has an output of 0.700 mW, and speaker B has an output of 1.90 mW. A 4.00 m| В 3.00 m 2.00 m (a) Determine the sound level (in decibels) at point C assuming only speaker A emits sound. 73.4 dB (b) Determine the sound level (in decibels) at point C assuming only speaker B emits sound. 91.3 dB (c) Determine the sound level (in decibels) at point C assuming both speakers emit sound. 91.3 dB

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Special Relativity

The theory of special relativity discusses how space and time are related to objects traveling along a straight line at a constant speed. Simply stated, as an object reaches the speed of light, its mass becomes infinite and it is unable to move faster than light. This interstellar speed limit has been the topic of much debate in astronomy, and also in science fiction when people consider how to fly over large distances.