The phosphorus cycle is the biogeochemical cycle that describes the movement of phosphorus through the lithosphere,

hydrosphere, and biosphere. unlike many other biogeochemical cycles, the atmosphere does not play a significant role in the

movement of phosphorus, because phosphorus and phosphorus-based compounds are usually solids at the typical ranges of

temperature and pressure found on earth. one important source of soluble phosphorus is the weathering of certain minerals. the

most common source of phosphates in the soil is the weathering of

a)

the mineral apatite.

mineral fertilizers.

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clays and iron oxides.

microbial action on manure.

Afixed electric space heater wired by a cable with an ampacity of 30 a should draw a maximum current of a. 30 a. b. 24 a. c. 15 a. d. 27 a.

Air enters a compressor operating at steady state at 1.05 bar, 300 k, with a volumetric flow rate of 93 m3/min and exits at 12 bar, 400 k. heat transfer occurs at a rate of 15.5 kw from the compressor to its surroundings. assuming the ideal gas model for air neglecting kinetic potential energy effects, determine the power in put in kw.

According to newton's second law, when the same force is applied to two objects of different masses, a the object with greater mass will experience a great acceleration, and the object with less mass will experience an even greater acceleration, b. the object with greater mass will experience a smaller acceleration, and the object with less mass will experience a greater acceleration, c. the object with greater mass will experience a greater acceleration, and the object with less mass will experience a smaller acceleration, d. the object with greater mass will experience a small acceleration, and the object with less mass will experience an even smaller acceleration.