Question and answer
1. If a 72-candela light source is located at a distance of 3 meters from a surface, the illuminance on the surface is A. 24 lux. B. 648 lux. C. 216 lux. D. 8 lux.
If a 72-candela light source is located at a distance of 3 meters from a surface, the illuminance on the surface is 8 lux.
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Asked 6/26/2016 8:45:17 PM
Updated 6/27/2016 8:09:08 AM
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This answer has been confirmed as correct and helpful.
Edited by jeifunk [6/27/2016 8:09:07 AM], Confirmed by jeifunk [6/27/2016 8:09:08 AM]
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Which one of the following substances is a liquid fuel used in rocket engines? A. Ammonia B. Potassium perchlorate C. Codium nitrate D. Liquid oxygen
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Liquid oxygen is a liquid fuel used in rocket engines.
Added 12/8/2016 1:25:42 PM
This answer has been confirmed as correct and helpful.
Confirmed by Janet17 [12/8/2016 1:27:37 PM], Rated good by Janet17
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