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
PROPANE Thirty times two cubic feet is sixty cubic feet per hour. One cubic foot of propane contains 2,488 BTU 60 cubic feet of propane contains 149,280 BTU Your rate of consumption is 149,280 BTU/hr. One gallon of propane contains 93,000 BTU. 149,280 divided by 93,000 equals 1.61 gallons.Your rate of consumption is 1.61 gallons per hour.ROPANE Thirty times two cubic feet is sixty cubic feet per hour. One cubic foot of propane contains 2,488 BTU 60 cubic feet of propane contains 149,280 BTU Your rate of consumption is 149,280 BTU/hr. One gallon of propane contains 93,000 BTU. 149,280 divided by 93,000 equals 1.61 gallons.