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Wikipedia:Reference desk/Archives/Science/February 2019

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Welcome to the Wikipedia Science Reference Desk Archives
The page you are currently viewing is a monthly archive index. While you can leave answers for any questions shown below, please ask new questions on one of the current reference desk pages.



February 1

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Wikipedia:Reference_desk/Archives/Science/2019 February 1

  1. Butterfly size

February 2

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Wikipedia:Reference_desk/Archives/Science/2019 February 2

  1. Exact frequencies for hydroxyl lines (18 cm band)
  2. Enzyme workload and its performance.

February 3

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Wikipedia:Reference_desk/Archives/Science/2019 February 3

  1. "-Idine" Suffix
  2. why the comet 67P/ Churyumov–Gerasimenko has bottle neck?

February 4

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Wikipedia:Reference_desk/Archives/Science/2019 February 4

  1. Nasal septum deviation

February 5

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Wikipedia:Reference_desk/Archives/Science/2019 February 5

  1. Body System
  2. Why isn't low self-esteem considered a mental illness?
  3. Magnetic field cancellation material

February 6

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Wikipedia:Reference_desk/Archives/Science/2019 February 6

  1. Plumbing problem
  2. Inside of cat mouth color

February 7

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Wikipedia:Reference_desk/Archives/Science/2019 February 7

  1. What happens when you fall asleep in a dream?
  2. Shattering window in space

February 8

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Wikipedia:Reference_desk/Archives/Science/2019 February 8

  1. Voyager
  2. Aerographite balloon
  3. Nucleation theory of Liesegang rings

February 9

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Wikipedia:Reference_desk/Archives/Science/2019 February 9

  1. Arrow of Time
  2. Can some people never do backflips, front flips, or handstands?
  3. Human urine by gender.

February 10

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Wikipedia:Reference_desk/Archives/Science/2019 February 10

  1. Will it ever be possible to invent a time machine?
  2. Why absorbance is measured with Arbitrary Units
  3. 2009 satellite collision
  4. Elimination of the air travel

February 11

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Wikipedia:Reference_desk/Archives/Science/2019 February 11

  1. Dehumidifying ability of these new-fangled inverter air conditioners
  2. Why do galaxies collide?

February 12

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Wikipedia:Reference_desk/Archives/Science/2019 February 12

  1. Could it be a biological creature than lay eggs but it soesn't have as sexual reproduction?
  2. Many worlds interpretation

February 13

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Wikipedia:Reference_desk/Archives/Science/2019 February 13

  1. Proper distance along a path (formula dimension ?)
  2. Did the Southern Hemisphere ever have a boreal forest/taiga?
  3. Detecting sources of wave function collapse

February 14

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Wikipedia:Reference_desk/Archives/Science/2019 February 14

  1. Aluminum luggage and laptops through x-ray
  2. Matter anti-matter annihilation

February 15

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Wikipedia:Reference_desk/Archives/Science/2019 February 15

  1. Geology - Htee Pwint Kan Umbrella Pond
  2. Upper bound on heat loss through an open door?

February 16

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Wikipedia:Reference_desk/Archives/Science/2019 February 16

  1. Hippocrates: "A person who has an injury in the back of the hand or the back of the leg will die in 12 days"
  2. Leeches

February 17

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Wikipedia:Reference_desk/Archives/Science/2019 February 17

  1. Do those rockets abandoned in geostationary transfer orbits ever reenter decades later without ever reaching low eccentricity?
  2. Occupational hazard?
  3. Video defect
  4. Binoculars vs Nikon P1000
  5. Slow-close toilet seat

February 18

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Wikipedia:Reference_desk/Archives/Science/2019 February 18

  1. Mass of nucleons
  2. Foreskin joining/growing together with the glans penis.
  3. Heating Oil Consumption

February 19

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Wikipedia:Reference_desk/Archives/Science/2019 February 19

  1. De Broglie Wavelengths of particles
  2. Germ theory
  3. Jordan canonical form

February 20

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Wikipedia:Reference_desk/Archives/Science/2019 February 20

  1. Balance Equations
  2. Why does only human being cuts off the umbilical cord?
  3. Mountain view (not in California)
  4. What could happen when one doesn't tie the umbilical cord after cutting off?

February 21

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Wikipedia:Reference_desk/Archives/Science/2019 February 21

  1. Carbon 14 beta decay
  2. "Mamankanois"
  3. Stopping the bleeding using absorbent dressing
  4. Frequency of the sound of water falling
  5. Pattern in digital clock deviations
  6. Megachile pluto - Giant Bee

February 22

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Wikipedia:Reference_desk/Archives/Science/2019 February 22

  1. Consciousness as information?
  2. Term for plants with both sexual and asexual reproduction, and sexual always preferred?

February 23

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Wikipedia:Reference_desk/Archives/Science/2019 February 23

  1. European Stag Beetle Comment

February 24

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Wikipedia:Reference_desk/Archives/Science/2019 February 24

  1. Jenny (not Lind)
  2. Subspecies and gender identification for two images (WP:FP related)
  3. Smallpox infection and eradication
  4. Is there a place in the world in which in July or August it's colder than its temperature in other times?

February 25

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Wikipedia:Reference_desk/Archives/Science/2019 February 25

  1. Are there any doctors ...
  2. Anatomy of rental electric scooters

February 26

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Wikipedia:Reference_desk/Archives/Science/2019 February 26

  1. Is there a scientific basis for the claim that the 3rd day after an injury is the most dangerous or painful?
  2. guide us about the black holes with standard references
  3. Calculations of observable universe

February 27

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Wikipedia:Reference_desk/Archives/Science/2019 February 27

  1. is climate change actually this impending catastrophe that some people say?

February 28

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Wikipedia:Reference_desk/Archives/Science/2019 February 28

  1. Semi-empirical mass equation
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