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Wikipedia:Reference desk/Archives/Science/May 2017

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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.



May 1

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Wikipedia:Reference_desk/Archives/Science/2017 May 1

  1. Are humans diverse enough to have immunity towards all diseases?
  2. Technology for launching satellites vs for ballistic missiles
  3. What was the highest text and/or number information density when the "first computer" and film were invented?

May 2

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Wikipedia:Reference_desk/Archives/Science/2017 May 2

  1. Squirrel ID
  2. What does it mean "cold sweat"?
  3. Antimicrobial properties of copper

May 3

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Wikipedia:Reference_desk/Archives/Science/2017 May 3

  1. What's the smallest feature of 14 and 10nm chips in the horizontal direction?
  2. Nicotine parent
  3. What is the reason to remove jewlarys in case of burn?
  4. Temperature change of air due to pressure drop
  5. Blood compatibility in pregnancy
  6. Would it make more sense for gas stations to sell by the pound or kilo?
  7. Tubeless bike tires with holes instead
  8. Height of Parinacota?

May 4

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Wikipedia:Reference_desk/Archives/Science/2017 May 4

  1. Second law of thermodynamics
  2. What do you get when divide time by distance?
  3. How much force to increase pressure?
  4. What has five leaves?
  5. Is dark energy ever considered to be "walls of the cosmos"? A few questions, mostly theoretical

May 5

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Wikipedia:Reference_desk/Archives/Science/2017 May 5

  1. Earth tidal heating
  2. Why we cannot see crescent of Venus

May 6

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Wikipedia:Reference_desk/Archives/Science/2017 May 6

  1. Acrylic Adhesive
  2. How can I swing
  3. Landlocked fish
  4. Feynman Lectures. Exercises [http://webcache.googleusercontent.com/search?q=cache:http://theswissbay.ch/pdf/Gentoomen%2520Library/Extra/Richard_Feynman-Feynman_Lectures_on_Physics%252C_Vol._1_Exercises-1964._Volume_1-Addison-Wesley(1964).pdf Google OCR]. Exercise 1-5 [http://html.scribd.com/91cmvs8wn433jb9d/images/7-20c29f2e20.jpg JPG]
  5. All-day use of CPAP Continuous positive airway pressure devices.
  6. What's the point of non-specialized scientific magazines?
  7. electric train whining noise
  8. Mass, acceleration, gravitational field, and electric field.
  9. Calories in Sucralose

May 7

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Wikipedia:Reference_desk/Archives/Science/2017 May 7

  1. Antidepressants
  2. Letters on a pill

May 8

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Wikipedia:Reference_desk/Archives/Science/2017 May 8

  1. Astronomy / Calendar : Thirteen Groups of (Almost) Eight
  2. Whom to trust?
  3. Magnetism
  4. Making sense out of North Korea's assassination plot suggestion
  5. Does the Milky Way rotate around anything?
  6. Blackest black fabric that is reasonable to achieve?
  7. Personality types.
  8. US energy efficiency drop
  9. Animals swallowing live prey

May 9

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Wikipedia:Reference_desk/Archives/Science/2017 May 9

  1. DIY teleprompter glass plate angle
  2. Feynman Lectures. Exercises [http://theswissbay.ch/pdf/Gentoomen%20Library/Extra/Richard_Feynman-Feynman_Lectures_on_Physics%2C_Vol._1_Exercises-1964._Volume_1-Addison-Wesley(1964).pdf PDF]. Exercise 1-8 [http://html.scribd.com/91cmvs8wn433jb9d/images/7-20c29f2e20.jpg JPG]
  3. Where's the highest railway? (above the surface, not sea level)

May 10

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Wikipedia:Reference_desk/Archives/Science/2017 May 10

  1. Several siblings, all male or female
  2. What does it mean "Negative logarithm" of the concentration of hydrogen ions.
  3. As more and more Hydrogen ions exist the more acidic it is?
  4. Thermodynamics of a permanent magnet
  5. Why do fat people have a lower pain threshold?
  6. Universe expansion

May 11

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Wikipedia:Reference_desk/Archives/Science/2017 May 11

  1. Psychology study about the perception of achievement
  2. Convection coefficient for Heat sink Calculation
  3. Elephants in a balanced ecosystem
  4. Why are combustion motors noisy?
  5. Could the US or Latin America have lots of wild elephants if someone had released breeding pairs?

May 12

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Wikipedia:Reference_desk/Archives/Science/2017 May 12

  1. Understanding the Wheels

May 13

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Wikipedia:Reference_desk/Archives/Science/2017 May 13

  1. Medicinal side effects
  2. Evolution of sexual selection in humans
  3. Lactose gene

May 14

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Wikipedia:Reference_desk/Archives/Science/2017 May 14

  1. Is Faraday's law of inductance properly applied to Wiki's article on LC circuits?
  2. Floating references
  3. ceramic capacitor vs tantalum capacitor
  4. Data and maths of man-made climate warming

May 15

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Wikipedia:Reference_desk/Archives/Science/2017 May 15

  1. Meaning of "above" in geology
  2. Induction and Convention of thermoelement
  3. Autopsies in the absence of a coroner's investigation
  4. Feynman Lectures. Exercises [http://theswissbay.ch/pdf/Gentoomen%20Library/Extra/Richard_Feynman-Feynman_Lectures_on_Physics%2C_Vol._1_Exercises-1964._Volume_1-Addison-Wesley(1964).pdf PDF]. Exercise 4-2 [http://html.scribd.com/91cmvs8wn433jb9d/images/8-91f1a7c855.jpg JPG][http://html2-f.scribdassets.com/91cmvs8wn433jb9d/pages/8-91f1a7c855.jsonp .]
  5. If one eats fruits and veggies without washing them or cooking them, then what is the likelihood of dying by acute illnesses and plant toxicity?

May 16

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Wikipedia:Reference_desk/Archives/Science/2017 May 16

  1. Death by Medicine
  2. Skin-mole color relation
  3. Spiked bulletproof surface
  4. project engineering, project management, project management office, construction management, commercial management, design engineer
  5. Explosive Reactive Armour
  6. Understanding ammonia

May 17

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Wikipedia:Reference_desk/Archives/Science/2017 May 17

  1. WW2 bomb disposal
  2. Lathe coolant

May 18

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Wikipedia:Reference_desk/Archives/Science/2017 May 18

  1. End mill
  2. What happened in AHA guideline in 2015 regarding to the definition of children age?
  3. Homogenous packaged, pre-cooked food
  4. Do any wild/feral animals know what traffic lights or walk signals mean?
  5. condensed climate chart

May 19

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Wikipedia:Reference_desk/Archives/Science/2017 May 19

  1. Feynman Lectures. Exercises [http://theswissbay.ch/pdf/Gentoomen%20Library/Extra/Richard_Feynman-Feynman_Lectures_on_Physics%2C_Vol._1_Exercises-1964._Volume_1-Addison-Wesley(1964).pdf PDF]. Exercise 4-4 [http://html.scribd.com/91cmvs8wn433jb9d/images/8-91f1a7c855.jpg JPG1][http://html.scribd.com/91cmvs8wn433jb9d/images/9-547346fc9a.jpg JPG2]
  2. Carpet bombing
  3. Physics Question about a clock meant to address time dilation
  4. Honey

May 20

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Wikipedia:Reference_desk/Archives/Science/2017 May 20

  1. Defibrillator paddles vs defibrillator pads/ patches
  2. Where are the amino-acids / steroids derivatives hormones are made in?
  3. Ladder paradox and electric circuit

May 21

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Wikipedia:Reference_desk/Archives/Science/2017 May 21

  1. What is the exact number of hormones in human?
  2. Heyday of immune system
  3. Power consumption of black and white screen
  4. Continuity equation for fluids

May 22

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Wikipedia:Reference_desk/Archives/Science/2017 May 22

  1. Brush for painting walls
  2. Eliminating infectious diseases by bioengineering large numbers of brainless humans with weakened immune systems?
  3. Why epinephrine is discriminated from nor-epinephrine and dopamine by the definition of hormone?
  4. Histamine is considered as hormone or not?
  5. How can gunpowder propel something over Mach 1?
  6. What kind of voltage regulator is this?

May 23

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Wikipedia:Reference_desk/Archives/Science/2017 May 23

  1. Chemistry - Chloro-amphetamine
  2. Sugar in baked beans
  3. Acidity and preservatives
  4. History of Allergy Testing in the 20th Century
  5. Feynman Lectures. Exercises [http://theswissbay.ch/pdf/Gentoomen%20Library/Extra/Richard_Feynman-Feynman_Lectures_on_Physics%2C_Vol._1_Exercises-1964._Volume_1-Addison-Wesley(1964).pdf PDF]. Exercise 4-14 [http://html.scribd.com/91cmvs8wn433jb9d/images/12-90e86da6f5.jpg JPG1][http://html.scribd.com/91cmvs8wn433jb9d/images/13-118a2acddc.jpg JPG2]
  6. Have any planes, ships or train cars had cables to increase stiffness or strength?

May 24

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Wikipedia:Reference_desk/Archives/Science/2017 May 24

  1. Decentralized electric networks
  2. Electric field at plane of non-conducting uniformly charged thin disk
  3. Table salt
  4. does tb has cure?

May 25

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Wikipedia:Reference_desk/Archives/Science/2017 May 25

  1. Can sea water be purified and made into fresh water?
  2. Soil formation on the bank of the Nile river
  3. How did the common people come to define "organic" to mean "without pesticides"?
  4. Human size and power of blows, strikes, kicks
  5. 16 Psyche on earth
  6. Can hormones be secreted by the endocrine system only?
  7. Solar and lunar eclipse in Toronto

May 26

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Wikipedia:Reference_desk/Archives/Science/2017 May 26

  1. Mammals that sexually mature later than humans?
  2. Exocrine system + endocrine system =?
  3. How does a creature adapt to city life?

May 27

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Wikipedia:Reference_desk/Archives/Science/2017 May 27

  1. Feynman Lectures. Exercises [http://theswissbay.ch/pdf/Gentoomen%20Library/Extra/Richard_Feynman-Feynman_Lectures_on_Physics%2C_Vol._1_Exercises-1964._Volume_1-Addison-Wesley(1964).pdf PDF]. Exercises 4-1...4-16
  2. Typical revolutions per minute of a fidget spinner
  3. Is there any pattern to warning symbols?

May 28

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Wikipedia:Reference_desk/Archives/Science/2017 May 28

  1. If babies are never weaned, then will they be able to digest lactose at later ages?
  2. What does the word "refractory" in "refractory period" refer to?
  3. Re: whale death due to ship strike. Why not attach a beeping horn to the ships bow to provide warning to whales in imminent danger?

May 29

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Wikipedia:Reference_desk/Archives/Science/2017 May 29

  1. What is shame from an evolutionary perspective?
  2. Domestic irradiator instead of a refrigerator?
  3. Help with understanding a U-series dating method
  4. Which plant?
  5. Frequency of solar eclipses at a given place
  6. Solar eclipse at the poles
  7. Does superluminal communication through a (traversable) wormhole inherently imply time travel?

May 30

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Wikipedia:Reference_desk/Archives/Science/2017 May 30

  1. The good, the bad, and the immunocompromised
  2. About Amader Electronics a popular Bengali Educational website and blog
  3. Cancer spreading through the blood
  4. Effect of purified vitamins orally and topically vs vitamins in foods orally or topically

May 31

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Wikipedia:Reference_desk/Archives/Science/2017 May 31

  1. Bbits per second
  2. Is sweetness intensity associated with sucrose quantity?
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