1.While camping, you record a thunderclap whose intensity is 10-2 Wm2. The clap reaches you 3.0 s after a flash of lightning. Estimate the total acoustical power generated by the bolt of lightning. Clearly state all assumptions that you made. 2. ** Blood speed A red blood cell travels at speed 0.40 ms in a large artery. A sound of frequency 2.00 * 106 Hz enters the blood opposite the direction of flow. (a) Determine the frequency of sound reflected from the cell and detected by a receiver. (b) If the emitted and received sounds are combined in the receiver, what beat frequency is measured?
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