(Solved): In a pig-calling contest, a caller produces a sound with an intensity level of 87dB. How many su ...

In a pig-calling contest, a caller produces a sound with an intensity level of $$87\mathrm{dB}$$. How many such callers would be required to reach the pain level of $$120\mathrm{dB}$$ ? Pulses A, B, C, and D all travel at $$10\mathrm{m}/\mathrm{s}$$ on the same string but in opposite directions. The string is depicted at time $$t=0$$ in . The small pulses have an amplitude of $$2.0\mathrm{cm}$$, and the large pulses have an amplitude of $$4.0\mathrm{cm}$$. Find the displacement of point $$P$$ at time $$t=0.10\mathrm{s}$$. Express your answer to two significant figures and include appropriate units. Part B Find the displacement of point $$P$$ at time $$t=0.20\mathrm{s}$$. Express your answer to two significant figures and include appropriate units. Pulses A, B, C, and D all travel at $$10\mathrm{m}/\mathrm{s}$$ on the same string but in opposite directions. The string is depicted at time $$t=0$$ in . The small pulses have an amplitude of $$2.0\mathrm{cm}$$, and the large pulse has an amplitude of $$4.0\mathrm{cm}$$. Find the displacement of point $$P$$ at time $$t=0.10\mathrm{s}$$. Express your answer to two significant figures and include appropriate units. Part B Find the displacement of point $$P$$ at time $$t=0.20\mathrm{s}$$. Express your answer to two significant figures and include appropriate units. Two speakers with opposite phase are positioned $$3.5\mathrm{m}$$ apart, both pointing toward a wall $$5.0\mathrm{m}$$ in front of them (see the figure(Figure 1 j). An observer standing against the wall midway between the If the observer hears ponstructive interference atter moving $$0.84\mathrm{m}$$ to one side along the wall, what is the frequency of the sound emitted by the speakers? speakers hears destructive interference. Express your answer using two significant figures.