What are the seismic waves that travel along earth’s surface and produce the most severe ground movements?

Determine the mass of fuel required for the expected energy consumption in the united states for the next ten years. energy use per person per year in the united states = 3.5 x 1011joules base calculations on current population of 310,000,000.

Why are pipes bursting in the in extremely cold weather?

Which metal exist in liquid state and can be cut with knife ?