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.
Depending on the type of paint you choose, paint and primer will cost anywhere from $15 to $60 per gallon. Designer and low-VOC paints often cost more. One gallon of paint will cover an average of 350 square feet.To calculate the number of gallons you will need, measure all surfaces to be painted.epending on the type of paint you choose, paint and primer will cost anywhere from $15 to $60 per gallon. Designer and low-VOC paints often cost more. One gallon of paint will cover an average of 350 square feet. To calculate the number of gallons you will need, measure all surfaces to be painted.