Answer: Hot air is less dense than cool air; the heated air causes the balloon to rise simply because it is lighter than an equal volume of cold air. Buoyancy is an upward force that the air exerts, and it helps hot-air balloons and blimps stay in the air. A hot air balloon uses a burner to heat up the air inside the balloon.
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D is ans becauseit convert
Explanation:
convert nitrogen gas in the atmosphere to ammonia. Nitrifying bacteria convert ammonia to nitrites or nitrates.
Answer:
Fat has more than twice as many calories per gram as carbohydrates and proteins.
Explanation:
An atrophic factors is a force that causes a cell to die, only natural forces on the cell are considered to be atrophic factors,whereas, and agents of mechanical or chemical abuse or lists of the cell are considered not to be atrophic factors. Which affect decrease workload loss of Innervation and diminishes your blood supplies , inadequate nutrition, and loss of enforce in stimulation and senility with compression.
Cells, the basic unit of life, are derived from spontaneous generation.
