Wikipedia:Reference desk/Archives/Science/February 2018

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

Wikipedia:Reference_desk/Archives/Science/2018 February 1

1. "Weak Filling Condition" - What does it mean?
2. Breaking an opponents neck

February 2

Wikipedia:Reference_desk/Archives/Science/2018 February 2

1. Equation for Period of Orbit
2. Omega 3
3. nurse watches, lapel watches

February 3

Wikipedia:Reference_desk/Archives/Science/2018 February 3

1. Cat claws in a fight
2. Concentrated Sodium cloride
3. Environmental science question.

February 4

Wikipedia:Reference_desk/Archives/Science/2018 February 4

1. 3 butterfly species
2. What's the highest voltage a closed circuit of D or 9 volt batteries in series could cause for ≥1 second?
3. Does soapy water kill my silverfish?
4. Is your lung capacity when you're standing greater than when you're sitting?

February 6

Wikipedia:Reference_desk/Archives/Science/2018 February 6

1. McKinley system of dealing with excrememnt
2. Regarding soundbars & loudspeakers
3. Question regarding Lake Tititcaca and former lakes in the same position with higher water levels

February 7

Wikipedia:Reference_desk/Archives/Science/2018 February 7

1. Follow-up on butterfly question
2. Macro biology
3. pivotal trials

February 8

Wikipedia:Reference_desk/Archives/Science/2018 February 8

1. Superliner
2. Whale with an impressive name

February 9

Wikipedia:Reference_desk/Archives/Science/2018 February 9

1. Can genes de-evolve back to an earlier stage?
2. Question regarding the reversibility of mutations.
3. "Cost" of a joule

February 10

Wikipedia:Reference_desk/Archives/Science/2018 February 10

1. Parenteral nutrition as a supplement for athletes?
2. Disinfectants that don't burn
3. Cornflakes / popcorn
4. Land area to feed a person?

February 11

Wikipedia:Reference_desk/Archives/Science/2018 February 11

1. Lemongrass oil as a chemical solvent?
2. Colour of tetracyanidonickelate(II)
3. What is wrong with hamsters?
4. Is high prevalence of hypothyroidism caused by lack of food in our evolutionary history?

February 12

Wikipedia:Reference_desk/Archives/Science/2018 February 12

1. When does flu season end
2. Epidemiology question
3. What does it mean "Drugs of reflex action on coronary {coronal] vessels"?
4. Unknown crop of Yunnan, China
5. Dietary Salt

February 13

Wikipedia:Reference_desk/Archives/Science/2018 February 13

1. Why do pathologist always dissect bodies after death?

February 14

Wikipedia:Reference_desk/Archives/Science/2018 February 14

1. To ride the storm
2. Calder Hall
3. Celery Seed

February 15

Wikipedia:Reference_desk/Archives/Science/2018 February 15

1. Nature (journal) still British?
2. DIY automatic fire suppression with a CO2 bottle attached to a line
3. In pregnancy, women should have deacrese or increse blood pressure, physiologicaly?
4. Effect on circulation, extremity in cold water
5. How is blood pressure is measured in a person without extremities at all?
6. Relative Density

February 16

Wikipedia:Reference_desk/Archives/Science/2018 February 16

1. Humidifiers
2. Using a water flow sensor for a gas

February 17

Wikipedia:Reference_desk/Archives/Science/2018 February 17

1. "Molecules of light" -- break this stuff down for us
2. Multiple shootings statistics

February 18

Wikipedia:Reference_desk/Archives/Science/2018 February 18

1. Chemical purification
2. Is ordinary canned spray paint flexible enough to be applied on fabrics?
3. Rubbing alcohol

February 19

Wikipedia:Reference_desk/Archives/Science/2018 February 19

1. Why Isn't There an Article on Ibrahim El-Osery

February 20

Wikipedia:Reference_desk/Archives/Science/2018 February 20

1. Gone today hair tomorrow
2. Asking for an operator

February 21

Wikipedia:Reference_desk/Archives/Science/2018 February 21

1. what is the U-shaped piece of wire in the front for?
2. What is a direct-view portable TV?

February 22

Wikipedia:Reference_desk/Archives/Science/2018 February 22

1. Missed approaches
2. evolution and human Reproduction special case; specially subordination of lunar cycle

February 23

Wikipedia:Reference_desk/Archives/Science/2018 February 23

1. Olive oil
2. Current Scientific opinion on Piaget and Kohlberg
3. Is Iodised salt broken in water?
4. Can someone reconcile the caldera and volcanic crater articles?
5. Clinical trial paradox

February 24

Wikipedia:Reference_desk/Archives/Science/2018 February 24

1. Weather control to prevent cold snaps and snowstorm s
2. Loss of cabin pressure

February 25

Wikipedia:Reference_desk/Archives/Science/2018 February 25

1. A low viscosity liquid which will harden after 20+ minute working time?
2. Feynman Lectures. Exercises. Exercise 19-17 JPG
3. How well do Tanks and other tracked vehicles coast?
4. Why do humans have body hair?

February 26

Wikipedia:Reference_desk/Archives/Science/2018 February 26

1. Static discharge and lightning igniting fuel

February 27

Wikipedia:Reference_desk/Archives/Science/2018 February 27

1. Isn't the anthropic principle a tautology?
2. Deflating tyres to drive over snow or sand
3. Bison fur pattern

February 28

Wikipedia:Reference_desk/Archives/Science/2018 February 28

1. Chemical purification, part 2
2. Chemical purification, part 3
3. Calculating the activation energy of a redox reaction
4. Why is estradiol cypionate so much more potent than estradiol valerate?