The annual electricity consumption of a household is 9,800 kWh. How many pounds of coal must be burned in a power plant to address this need? Assume a combined overall efficiency of 30% for the power plant and the transmission lines.
What will be an ideal response?
First we convert kWh to Btu/h.
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Science uses observations of phenomena in order to make interpretations. Which of the following is an observation?
A) A fold is visible in an outcrop. B) The fold was created by pressure. C) Pressure was applied slowly to fold the rock. D) Heat was applied to soften the rock.
Back-office functions are also called
A) business-process offshore banking. B) market threshold outsourcing. C) command and control centering. D) business-process outsourcing. E) tax advantage outsourcing.
Where was North America 150 million years ago?
A. over the south pole B. next to Antarctica C. next to Australia D. closer to Africa and South America E. None of these choices are correct.
a _____ is a mix of gas and dust emitted by a volcano that is so dense that it hugs the ground.
What will be an ideal response?