The field D = (4 x 2
e
x
y
2
)ax + (6e
y
x
2
/y2
)ay – (2x2
y
2
z)az C/m2

exists at the centre of (16) (CLO-2)

a cube defined by -4.4
a) Find the total flux leaving the closed surface of the cube by applying Gauss’s law
b) Find expression for the divergence of D at the center of the cube, and at P (-2, -4, 3)
c) Determine the total charge (Q) enclosed within the cube
d) Find the volume charge density if D = 1/x (2xyz ax + 4x2

z ay + (3z2
– 5x2
y) az)

Afour cylinder four-stroke in-line engine has a stroke of 160mm, connecting rod length of 150mm, a reciprocating mass of 3kg and its firing order is 1-3-4-2. the spacing between cylinders is 100mm. i. show that the engine is in balance with regard to the primary inertia forces and primary 3. a and secondary inertia couples. li determine the out of balance secondary inertia force ii. propose ways of balancing this out of balance force and discuss the challenges that will arise

Different types of steels contain different elements that alter the characteristics of the steel. for each of the following elements, explain what the element does when alloyed with steel.

Draw the engineering stress-strain curve for (a) bcc; (b) fcc metals and mark important points.