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Question1

There is three vectors, and another vector must be added to the following three vectors.

(a) Sketch a vector representation of four vectors.

(b) Write down a description of a physical situation in which these vectors are relevant and explain what units the vectors must have.

A= 97 units, 50 degree south of west
B= 202 units, 30 degree south of east
C= 168 units, 24 degree north of east

Question2

Evaluate the electrostatic energy of two opposite charges e and -e, a distance 7 Å apart in water at room temperature and that in a vacuum. It will be easiest to express the energy in terms of lB, such as Bjerrum length. Using this, give details why table salt dissolves in water.

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Category:- Physics
Reference No.:- M9720253

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