An electron moving parallel to the x axis has an initial speed of 4.58 106 m/s at the origin. Its speed is reduced to 1.06 105 m/s at the point x = 2.00 cm. (a) Calculate the electric potential difference between the origin and that point in volts (b) Which point is at the higher potential? the point x = 2.00 cm both have the same potential? or the origin?
Define the following terms with reference to fluid flow: Critical velocity Reynold’s number ii) Show that the flow rate Q, of a fluid of dynamic viscosity ?, flowing under laminar conditions through a horizontal circular pipe of diameter ‘d’, length ‘L’, with a mean velocity V, when the pressure difference between the ends is P, is given by the expression: Q=(ppd^4)/128?L Hence show that the pressure difference p can be given by the expression P=32?lv/d
May 18, 2016
7:59 pm
Read More »
