A reflected wavelength of light is detected by the detector and is decoded as a logic one; absorbed or transmitted wavelengths are not detected, there absence being decoded as a logic zero.
Answer:

Explanation:
From the question we are told that:
Number of lamps 
Potential difference 
Total Resistance of the lamp is 
Generally the equation for Current I is mathematically given by



Answer:
Number 2 is HDPE, or High-Density Polyethylene. It is most commonly found in plastic bags, oil and detergent bottles, and toys. It is one of the simplest polymers to recycle. It is broken down into flakes, decontaminated and then reused for pipes, flower pots or reused as (non-food) bottles.
Answer:
a) The flow capacity of the fan is 3150 L/min
d) the minimum diameter is 0.11 m
Explanation:
given data:
A = area of residence = 200 m²
h = height of building = 2.7 m
Percentage of air that must be replaced by fresh air is 35%
v = velocity of air in the duct = 5.5 m/s
a) The volume of the entire building is:

The flow capacity of the fan is equal to:


b) The volume flow rate of fresh air is equal to:
