At the beginning of this year, you went out and purchased $300 worth of gold coins. Every 3 months for the next 8 years, you pur
1 answer:
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Answer:
The intensity on a screen 70 ft from the light is 1.728 foot candle.
Step-by-step explanation:
Given that,
The magnitude of intensity of light varies inversely as the square of the magnitude of distance D from the source.
That is
Then,
Given that,
The magnitude of intensity of illumination on a screen 56 ft from a light is 2.7 foot-candle.
Here,
=2.7 foot-candle,
= 56 ft
=?,
= 70 ft.
foot-candle
The intensity on a screen 70 ft from the light is 1.728 foot candle.
1+13/15÷1+2/5
= 28/15÷7/5
= 28/15×5/7
= 4/3
The answer is 4/3.
