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?


Environmental & Atmospheric Sciences

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Leaf shapes of fossilized plants can be used to indicate climate conditions

a. True b. False

Environmental & Atmospheric Sciences

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

Environmental & Atmospheric Sciences

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

Environmental & Atmospheric Sciences

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.

Environmental & Atmospheric Sciences