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erma4kov [3.2K]
3 years ago
11

What percent of the energy used in the united states come from burning fossil fuels?

Physics
1 answer:
andreyandreev [35.5K]3 years ago
8 0
Here is a link that should help you out 
http://instituteforenergyresearch.org/topics/encyclopedia/fossil-fuels/

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1. The illuminance on a surface is 6 lux and the surface is 4 meters from the light source. What is the intensity of the source?
Crank

<u>Answer</u>

1) A. 96 Candelas

2) A. Both of these types of lenses have the ability to produce upright images.

3) C. 5 meters


<u>Explanation</u>

Q1

The formula for calculation the luminous intensity is;

Luminous intensity = illuminance × square radius

Lv = Ev × r²

= 6 × 4²

= 6 × 16

= 96 Candelabra

Q2

For converging lenses, an upright image is formed when the object is between the lens and the principal focus while a diverging lens always forms and upright image.

A. Both of these types of lenses have the ability to produce upright images.

Q3

Luminous intensity = illuminance × square radius

square radius = Luminous intensity/ illuminance

r² = 100/4

= 25

r = √25

= 5 m




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Optical Time Domain Reflector

Explanation:

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What will happen to the charge and potential difference if the plate area were increased while the plate separation remains unch
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Answer:

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Explanation:

Asking that :

What will happen to the charge and potential difference if the plate area were increased while the plate separation remains unchanged?

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Therefore, increase in the area of the plate will also lead to increase in potential difference between the plates.

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