Because only the rich can afford cheap batteries..... A good quality deep cycle lead acid battery will cost between $50 and $200 and, if properly maintained, will give you at least 150 deep discharge cycles.
What is the boiling point of oxygen? a. 100 degrees C c. -57 degrees C b. 8 degrees C d. -183 degrees C.
To liquefy oxygen, compression to high pressure and cooling to low temperature is required. The gas must be at its Critical Pressure of 49 atm. and cooled to a temperature of -118.4Â°C. When in liquid form, the pressure can be reduced to a little above atmospheric in a specially insulated vessel.