If a 18kg cart were placed on a 20° incline. What would be the magnitude of the cart's acceleration?

45 is the correct answer

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

How are period and frequency related to each other? dperiod is the reciprocal of frequency.