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Waterfalls are an erosive feature of the river system. Rivers erode their banks and bed through a variety of erosional processes, such as hydraulic action, corrosion, attrition and saltation. In the creat...

In all collisions momentum is conserved. However in elastic collision kinetic energy is also conserved, molecules colliding is an elastic collision.If kinetic energy is not conserved that then the collisi...

First we need to draw a velocity-time diagram, which has time on the x-axis, or bottom, and velocity on the y-axis, or left.The ball begins from a stop, so we can draw a dot at (0,0). It accelerates until...

If Fred and Julie share £60 in a 5:7 ratio, Fred will get 5/12ths of the money and Julie will get 7/12ths of the money. All together there will be 12 parts of the money because 5 + 7 = 12So, you need to d...

The 'perfect tense' is used to describe events in the past that had a definite ending whereas the imperfect tense if used to describe events which were ongoing. i.e. if we wanted to say: 'While Juan was e...