Isotonic exercises involve moving your joints and muscles rhythmically and repetitively through their ranges of motion using low resistance, while isometric exercises are static and require you to contract your muscles without joint motion.
Substations are normally outdoors and are enclosed by a wire fence. However in residential or high density areas, the substation may be indoors and housed inside a building to restrict the humming noise of the huge transformers. slide 2 of 6 View of a Substation
(ii) Supers1ructure. Sub-structure or Foundation is the lower portion of the building, usually located below the ground level, which transmits the loads of the super-structure to the supporting soil.A foundation is therefore that part of the structure which is in direct contact with the ground to which the loads are transmitted.Super-structure is that part of the structure which is above ground level, and which serves the purpose of its intended use.A part of the super-structure, located between the ground level and (he floor level is known as plinth.ii) Supers1ructure. Sub-structure or Foundation is the lower portion of the building, usually located below the ground level, which transmits the loads of the super-structure to the supporting soil.