Two radio antennas A and B radiate in phase at a frequency of 15 MHz. Antenna B is 115 m to the right of antenna A. Consider point Q along the line connecting the antennas, a horizontal distance x to the right of antenna A.

Part A

What is the smallest nonzero value of x for which there will be constructive interference at pointQ?

Express your answer in meters to two significant figures.

x = m
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Part B

What is the smallest nonzero value of x for which there will be destructive interference at point Q?

Express your answer in meters to two significant figures.

x = m

He can play two games. 13/4=3.253.25*2=6.5

When seismic waves hit a fault, the waves are reflected off the fault. seismograph can detect these reflected seismic waves. geologists then use these data to map the fault's length and depth

You need to be more specific.  i really don't know what a "motion map" is.you can draw a graph of an object's position, distance, displacement, speed,velocity, or acceleration versus time, or you can draw a graph of the object's x-position versus its y-position and not give any information about time at all.if the graph presents position or displacement against time,  then constant velocity is a straight line . . i.e. a line that has  constant slope.if the graph shows speed against time, then constant velocityis a horizontal piece of line.if the graph shows acceleration against time, then constant  velocity is a piece of line that lies on the x-axis . . it's value is zero.