Draw the history graph D(x = 4.0 m, t) at x = 4.0 m for the wave shown in FIGURE EX16
The history graph is shown
The snapshot graph of the wave is given at time t =2 sec and x= 4.0m The velocity of the wave is v = 1m/s The wave is traveling from left to right
A snapshot graph shows the displacement of the wave with respect to the position at a given time. A history graph shows the displacement of the wave with respect to the time at a given position.
Analyze the snapshot graph
The history graph is shown below.
Earthquakes are essentially sound waves—called seismic
waves—traveling through the earth. Because the earth is solid, it can support both longitudinal and transverse seismic waves. The speed of longitudinal waves, called P waves, is 8000 m/s. Transverse waves, called S waves, travel at a slower 4500 m/s. A seismograph records the two waves from a distant earthquake. If the S wave arrives 2.0 min after the P wave, how far away was the earthquake? You can assume that the waves travel in straight lines, although actual seismic waves follow more complex routes.
LASIK eye surgery uses pulses of laser light to shave off tissue
from the cornea, reshaping it. A typical LASIK laser emits a
1.0-mm-diameter laser beam with a wavelength of 193 nm. Each
laser pulse lasts 15 ns and contains 1.0 mJ of light energy.
a. What is the power of one laser pulse?
b. During the very brief time of the pulse, what is the intensity
of the light wave?
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