Question

11. Passage
Friction is defined as the force which opposes the relative motion between the bodies in contact. The
frictional force acts in a direction opposite to the direction of motion of the body
i. Frictional force is one of the type in form of
I 1
a) basic force
b) gravitational force c) electromagnetic force d) nuclear force
Frictional force is
[ ]
a) horizontal component of reaction force b) vertical component of reaction force
c) resultant of normal reaction and reaction force d) none of these
Frictional force has
[ ]
a) only advantages
b) only disadvantages
c) both advantages and disadvantages
d) Neither advantageous nor dis advantageous​

Answer 1

Explanation:

Sludge is a semi-solid slurry that can be produced from a range of industrial processes, from water treatment, wastewater treatment or on-site sanitation systems.

Industrial wastewater treatment plants produce solids that are also referred to as sludge.