gradient = \(\frac{change~in~y}{change~in~x} = \frac{change~in~speed}{change~in~time} = \) \( \frac{change~in~metres~per~second}{change~in~seconds}\) = metres per ...
Figure 1: Map of western US displaying samples of fine structure near the 410-km seismic discontinuity. At the longer epicentral distances of 21–24°, however, it is the branch AB that is bottoming ...
Speed-time graphs show speed on the vertical axis and time on the horizontal axis. The gradient of a speed-time graph represents acceleration because: gradient = \( \frac {\text{change in ...