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. 3  3. 4  4. 5  5. 6  Back.
how much propane will i use i will be building an ig pool and ig spa 7ft spa i will be heating the spa with a 400k btu propane heater i would like to heat the pool a couple of time per year for special events local code limits the size of a propane tank to 125 gallons anything bigger will require a permit from the fire dept
Multiply total gallons by 95,475 to figure total BTUs of usage. To figure the total propane for your home, multiply total gallons of propane for the year by 95,475. The result is the total BTUs your family consumes in a year. Example: 800 gallons * 95,475 = 76,380,000 BTUs.ccording to Home Energy: Advancing Home Performance, 39.4 percent of homes using propane heating use between 5 and 10 British Thermal Units (BTU) per square foot. Only 12.2 percent use under 5 BTUs per square foot.