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Korolek [52]
2 years ago
5

a relationship between two or more variables that is shown is an observational study is a: a. correlation. b. social norm. c. co

upling. d. causal relationship.
Physics
1 answer:
Tasya [4]2 years ago
7 0

Answer:

Correlation

Explanation: Answer for Ap3x

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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




5 0
3 years ago
Read 2 more answers
Which of the following is an example of an electromagnetic wave?
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light from a neon sign


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