1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Olegator [25]
3 years ago
14

Suppose a person (height of 1.8 m) walks in a room installed with a pyroelectric infrared (PIR) motion detector. The distance be

tween the person and the PIR detector is 5 m. The PIR detector sensor is 3 cm x 1 cm in size.
Estimate the radiated power at the surface of the sensor from the person. Assume that emissivity of human skin/fabric and sensor cap is 0.9. Assume that the person’s body temperature is 37°C and the temperature at the surface of PIR detector is at 18°C. Also assume that there is no radiated power loss through air and Fresnel lens. You can roughly estimate surface area of the person.
Engineering
1 answer:
3241004551 [841]3 years ago
8 0

Answer: b is your best option

Explanation:

You might be interested in
Identify the measurement shown in figure 7 and state in centimeters ​
Sav [38]

Answer:

1.3cm

Explanation:

the arrow is 3 lines past the 1 so it is 1.3cm

6 0
3 years ago
What happens when force is placed on a square/rectangle?
mart [117]

im not sure i need to see a photo and also is this science

7 0
3 years ago
Read 2 more answers
I will Brainlist<br> "Burning and Inch". Describe this measurement.
MAVERICK [17]

Answer:

what measurement

Explanation:

8 0
2 years ago
Read 2 more answers
10 POINTS!!
marusya05 [52]

Answer:

disable yahoo from activating.

Explanation:

 either force quit it or add chrome to your user bar at the bottom of the screen (if ure on a computer) if yahoo is on ur bar make sure to force quit it by right clicking and clicking "force quit" and it should stop

5 0
3 years ago
Suppose you were doing an A* search and there were a number of different ways that you could compute an admissible heuristic val
Elodia [21]

Answer:

Explanation:

First of all,we need to know what kind of research and how important it is before determining which computation method to use .

Then compare end result of research and cost of  expensive methods .

Then we should opt for the best expensive method to be used for the given application.

5 0
3 years ago
Other questions:
  • A cylindrical specimen of a hypothetical metal alloy is stressed in compression. If its original and final diameters are 30.00 a
    14·1 answer
  • The pistons of a V-6 automobile engine develop 226.5 hp. If the engine driveshaft rotational speed is 4700 RPM and the torque is
    14·1 answer
  • What are the two safety precautions taken before driving a car​
    12·1 answer
  • What is the correct statement regarding the stress over the section of a shaft in torsion?
    13·1 answer
  • Electrical pressure or “force”<br><br> A) current<br> B) resistance <br> C) voltage
    6·1 answer
  • A 25 lb sacrificial Mg anode is attached to the steel hull of a container ship. If the anode completely corrodes within 3 months
    10·1 answer
  • A 4-pole, 3-phase induction motor operates from a supply whose frequency is 60 Hz. calculate: 1- the speed at which the magnetic
    10·1 answer
  • Compute the volume percent of graphite, VGr, in a 2.5 wt% C cast iron, assuming that all the carbon exists as the graphite phase
    9·1 answer
  • one number is 11 more than another number. find the two number if three times the larger number exceeds four times the smaller n
    14·1 answer
  • Why is it important to follow the engineering design process before building a prototype
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!