An isotonic contraction can be concentric, which is where the muscle shortens as the fibres contract or eccentric, where the fibres contract as the muscle lengthens. When a muscle contracts with no resulting movement, it is an isometric contraction. Page: 1  1. 2  2.
To determine how much paint your house needs, measure the house's perimeter. Then multiply that figure by the height, excluding gable ends. Take the measurements with a steel tape measure, or reel out a ball of twine around the house and mark and measure the twine.
Painting the House Yourself. Add up the cost of all the supplies you will need such as paint, rollers and brushes. One gallon of paint covers approximately 350 to 400 square feet. The cost of the paint can vary a lot depending on the quality of the paint you buy and whether it is interior or exterior paint.ne gallon of paint covers approximately 350 to 400 square feet. The cost of the paint can vary a lot depending on the quality of the paint you buy and whether it is interior or exterior paint.