How do the locations of frequent earthquakes support the theory of plate tectonics?
a. they shake the top layer of the earth.
b. they create large rifts in the earth.
c. they occur along the edges of the tectonic plates.
d. they alter the topography of the surface of the earth.

An object of dimensions 50 cm x 40 cm x 0.20 cm has a mass 60g. find its density in g/cm3 and kg/ m3

What is created when solids,liquids,an gases mix with one another

Arigid tank is divided into two equal parts by a partition. one part of the tank contains 3 kg of compressed liquid water at 400 kpa and 60°c while the other part is evacuated. the partition is now removed, and the water expands to fill the entire tank. determine the entropy change of water during this process, if the final pressure in the tank is 40 kpa. use steam tables.