Sled A (with its riders) has twice the mass of Sled B (with its riders). If both sleds have the same kinetic energy, which sled is moving faster?

It equals just about 6,300 km per hour each day an week

When is this

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