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
Ray Of Light [21]
3 years ago
12

In the Landolt-C acuity test, the average threshold for accurately identifying the position of the gap in the C-like character w

as 0.75mm in size, at a distance of 3000mm. What angle is subtended by the gap at this acuity threshold? Show your working and give your answer in Minutes of arc.
Biology
1 answer:
Stella [2.4K]3 years ago
4 0

Answer:

  0.859 minutes of arc

Explanation:

The arc length for a given radius and angle in radians is ...

  s = rθ

So, the angle is ...

  θ = s/r

For the given geometry, the angle in radians is ...

  θ = (0.75 mm)/(3000 mm) = 0.00025 radians

In minutes of arc, this is ...

  (0.00025 radians)(60 minutes/degree)(180 degree/(π radians)

  = (0.0025)(60)(180)/π minutes

  ≈ 0.859 minutes

The angle subtended is about 0.859 minutes of arc.

You might be interested in
Sientific method hypothesis​
Assoli18 [71]
The process of the scientific method involves making conjectures (hypotheses), deriving predictions from them as logical consequences, and then carrying out experiments or empirical observations based on those predictions. A hypothesis is a conjecture, based on knowledge obtained while seeking answers to the question.
6 0
3 years ago
This is an organism that supplies matter and energy, also known as an autotroph
mariarad [96]
I'm assuming that you want us to tell you what organism does these things. So it would be a plant.
7 0
3 years ago
Read 2 more answers
How is excretion carried out in reptiles that live on land
joja [24]
<span>Reptiles that live on land convert the ammonia in their unrine to uric acid, which is much less toxic , so it doesn't need to be diluted as much. Also excess water is absorbed in the cloaca, reducing the urine to a paste and conserving water.</span>
7 0
3 years ago
Read 2 more answers
Do all cells need ribosomes
sammy [17]
Yes they do without it they could not produce protein.
6 0
3 years ago
7. Are there any mammalian cells that would be a good source for dividing cells? What types of cells would most like NOT have ce
d1i1m1o1n [39]

Answer:

Sorry the first one I don't know.

The second one's answer is :  Mature nerve cells, cardiac muscle cells, skeletal muscle fibers, fat cells, red blood cells, bone cells (osteocytes), and white blood cells (except lymphocytes) do not undergo division

8 0
2 years ago
Other questions:
  • Hydrolytic enzymes must be segregated and packaged to prevent general destruction of cellular components. Which of the following
    14·1 answer
  • What is the abbreviation for an inherited disease characterized by large, fluid-filled cysts that grow within the kidneys and pr
    5·1 answer
  • The _____ separate in meiosis i; the _____ separate in meiosis ii.
    7·1 answer
  • Define cell conjunctions
    13·1 answer
  • Plz help!!!!<br> Answer
    14·1 answer
  • Refused to let Americans ship products down the
    10·1 answer
  • Which choice is involved in both sexual and asexual reproduction?
    10·2 answers
  • The nucleus of an atom comprises of _______________ and _______________
    11·2 answers
  • Construyamos 5 preguntas que nos sirvan para conocer más acerca de qué son las normas y las leyes y para qué nos sirven,
    5·1 answer
  • My little brother’s science teacher gave him a mini project. The guiding question is “What brand of paper towels is best?” Basic
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!