Toy locomotive on a circular track of radius 0.60 m At time t = 0, the locomotive is at point A. The locomotive travels at a constant speed round the track.
It takes 20 s to travel completely round the track.
(i) Calculate the speed of the locomotive

List one type of erosion and describe how it happens?

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.

Which is a substance that can be separated by physical means and is not the same throughout