According to Sylvania (a light bulb manufacturer), its 40-W CFL light consumes 9 W and produces 495 lumens. What is the efficacy for this light?
What will be an ideal response?
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Leaf shapes of fossilized plants can be used to indicate climate conditions
a. True b. False
The Human Development Index (HDI) index is derived from three measurable variables: life expectancy at birth, ________, and income
A) industrialization B) calories available per capita C) labor force in agriculture D) educational attainment
When the base of the cloud is positively charged and the ground negatively charged, a(n) ____________________ cloud-to-ground lightning flash may result
Fill in the blank with correct word.
The causes of the current (sixth) mass extinction include all of the following EXCEPT ________
A) pollution from pesticides, eutrophication, and other causes B) habitat alteration and destruction C) global climate change D) earthquakes, tsunamis, and forest fires E) invasive exotic species