Which of these is the most likely impact of extensive mining of coal to produce energy? - pollution of atmosphere by harmful gases - increase in fertility of soil because of minerals - purification of underground water by natural minerals - increase in level of harmful radiation in the atmosphere stuck on this question and really can't figure it out! can someone or link me to some information?
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An insulated 40 ft^3 rigid tank contains air at 50 psia and 120°f. a valve connected to the tank is now opened, and air is allowed to escape until the pressure inside drops to 25 psia. the air temperature during this process is kept constant by an electric resistance heater placed in the tank. determine the electrical work done during this process.
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Which of these is the most likely impact of extensive mining of coal to produce energy? - pollution...
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