Light Bulbs Are Measured in Lumens (Light Output), Watts (Energy

question 13

Multiple Choice

Light bulbs are measured in lumens (light output) , watts (energy used) , and hours (life) .A standard white light bulb has a mean life of 675 hours and a standard deviation of 50 hours.
A soft white light bulb has a mean life of 700 hours and a standard deviation of 35 hours.At
A local science competition, both light bulbs lasted 750 hours.Which light bulb's life span
Was better?

• A)The standard white light bulb because it is 75 hours beyond the mean.
• B)The soft white light bulb because it is 50 hours beyond the mean.
• C)The standard white light bulb because it is 11% beyond the mean.
• D)The soft white light bulb because it is 7% beyond the mean.
• E)The standard light bulb because it lasted 1.5 standard deviations above the mean life.

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Definitions:

Surface

The outermost or uppermost layer of an object or area which is in direct contact with the environment.

Upper Mantle

The upper mantle refers to the portion of the Earth's mantle that lies just beneath the crust and extends to depths of about 660 kilometers, involved in tectonic processes.

Lower Mantle

The section of the Earth's mantle that extends from approximately 660 to 2900 kilometers below the surface, characterized by high pressure and temperature.

Geologic Aspects

Refers to the features, processes, and phenomena related to the Earth's solid matter and its historical and present state.