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If a 72-candela light source is located at a distance of 3 meters from a surface, the illuminance on the surface is _______ lux. A. 8 B. 24 C. 648 D. 216
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. E=I/s² E = 72/9 = 8 lux
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Asked 10/9/2018 1:48:51 PM
Updated 10/9/2018 2:25:22 PM
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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.
E=I/s²
E = 72/9 = 8 lux
Added 10/9/2018 2:25:22 PM
This answer has been confirmed as correct and helpful.
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Updated 10/9/2018 8:10:09 AM
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Hints of what's coming next in the plot -is what foreshadowing provides the reader in a story.

Added 10/9/2018 8:10:09 AM
This answer has been confirmed as correct and helpful.
19. The side characters in novels tend to A. be less developed than in short stories. B. only appear in a few episodes. C. have lives and stories of their own. D. be present in every single scene.
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Updated 10/9/2018 9:25:40 AM
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The side characters in novels tend to only appear in a few episodes.
Added 10/9/2018 9:25:40 AM
This answer has been confirmed as correct and helpful.
Confirmed by yumdrea [10/9/2018 10:16:50 AM]
20. A block has a volume of 0.07 m3 and a density of 3,500 kg/m3. What's the force of gravity acting on the block (and weight) in the air? A. 2,058 N B. 2,401 N C. 1,715 N D. 686 N
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Updated 10/9/2018 8:38:54 AM
1 Answer/Comment
A block has a volume of 0.07 m3 and a density of 3500 kg/m3. The force of gravity acting on the block in air is 2401 N. density = mass / volume , mass= 3500*0.07 =245 kg , force = mass *acc , force = 245 *9.8 = 2401 N.
Added 10/9/2018 8:38:54 AM
This answer has been confirmed as correct and helpful.
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Updated 10/9/2018 9:05:03 AM
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Added 10/9/2018 9:05:03 AM
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