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.
For water the boiling point is 212 degrees, that s why we need to heat it on a stove. For nitrogen the boiling point is minus 320 degrees, so the liquid nitrogen is boiling at room temperature to become air.