A 60-W Bulb Is Operating at an Efficiency of 6

question 87

Multiple Choice

A 60-W bulb is operating at an efficiency of 6.20%. What is the number of photons per second given off by the bulb assuming the wavelength of light to be 580 nm?

• A) 5.42 × 10¹⁸ photons/s
• B) 10.8 × 10¹⁸ photons/s
• C) 16.2 × 10¹⁸ photons/s
• D) 21.7 × 10¹⁸ photons/s
• E) 25.3 × 10¹⁸ photons/s

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Definitions:

Thyroxine

A substance created by the thyroid gland responsible for controlling metabolism, the production of energy, and the processes of growth and development.

Prolactin

Hormone secreted by the pituitary gland that stimulates cells of the mammary glands to produce milk in a nursing mother. Helps maintain water and electrolyte balance in fishes and amphibians. Inhibits metamorphosis in amphibians and stimulates molting in reptiles. Has a role in immune function and in the formation of new blood vessels.

Induce Labor

Medical or natural interventions to stimulate the onset of labor before it begins spontaneously, often through the use of drugs or other techniques.

Anterior Lobe

The front portion of an organ or gland, which can refer specifically to a part of the pituitary gland that releases hormones controlling various physiological processes.