A wave is described by y(x,t) = 0.4 sin(3x - 27t), where x is in meters, y is in centimeters and t is in seconds. At time t = 0, the point at x = 0 has a vertical displacement y = 0.0 cm. Find time (in seconds) when its displacement equal to 0.4 cm.     none of these     0.384     0.070     1.152     0.175

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A wave is described by y(x,t) = 0.4 sin(3x - 27t), where x is in meters, y is in centimeters and t is in seconds. At time t = 0, the point at x = 0 has a vertical displacement y = 0.0 cm. Find time (in seconds) when its displacement equal to 0.4 cm.
   
none of these
   
0.384
   
0.070
   
1.152
   
0.175
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