From Wikipedia, the free encyclopedia
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.
Wikipedia:Reference_desk/Archives/Science/2012 April 1
exponential power of 2 and number of ancestors 30 generations ago
fine structure
In Situ Generation of Acid Catalyst in Esterification
Regarding Common Emitter BJT configuration.
Canning timing
Metallicity of stars
Sound c ards
Dogs who howl at the phone
Subjective biking effort
Wikipedia:Reference_desk/Archives/Science/2012 April 2
What is the effective population size of the United Kingdom?
Glow leak
Load in motor and current
fine -structure
Wikipedia:Reference_desk/Archives/Science/2012 April 3
Gravity
Underwater hand stand
Sprained pelvises
Pencil sharpener
Male emotion
Is the outside of single cell algae lipophilic or hydrophilic?
A formal symbol for a postulated absolute rest frame?
Wikipedia:Reference_desk/Archives/Science/2012 April 4
Black hole gravity
Why is pressure a scalar?
there are 4 kinds of topology in Set{1,2},and 29 in Set{1,2,3}, is exist a Formula in a Set {1,2,3,4,5,6...n}?
How is heat energy converted to mass?
can some women not orgasm from intercourse, but only clitorally
Live engineering status for UK TV and radio broadcast towers
empty space
hydrocortisone
Frank Sherwood Rowland
Wikipedia:Reference_desk/Archives/Science/2012 April 5
Types of copper
volume measurer
retrograde rotation of venus
Escaping from a black hole
Body fat monitor
Caramel Catastrophe!
Instantaneous communication at a distance
Have they ever tried multi-stage balloons?
Wikipedia:Reference_desk/Archives/Science/2012 April 6
Dandruff and eyes
Virtual work
Dreams: maker versus watcher
Middle East climate
Vitamin B12 absorption
Uniqueness of the attractor for Earth's climate
Explaining light
Escape velocity
Wikipedia:Reference_desk/Archives/Science/2012 April 7
How much extreme weather damage can the world economy take?
Male sexual activity and cognitive performance
Physics LC circuit
Electronics on board Apollo 11 spacecraft
Using tachyons to blast something out of a black hole
Radicals and VSEPR
Wikipedia:Reference_desk/Archives/Science/2012 April 8
Illumination in lumen additive or parallel?
Strange zoo bird
Octane rating of jet fuel
Do different chicken breeds have different tastes?
mercury spectrum
sodium spectrum
physics
Could Kinect ever come with a force-feedback body suit?
Why can't the Kinect recognize fingers and head movements?
which reaction formula is right?
Mystery bird
calcium metaborate
Why do cows eat grass?
Bayes' theorem in medical diagnostics
Group 14 electronegativities
A few questions from a science fiction author: Lethality of small amounts of high explosives and theoretical weapons systems
Wikipedia:Reference_desk/Archives/Science/2012 April 9
low blood pressure and i. v. heroin use
Perfectly elastic collisions for equal masses
CARDIOLOGY
Seahorse gender
white hole
Wikipedia:Reference_desk/Archives/Science/2012 April 10
Unknown drug powder ID
postcognition
Could a satellite really pack the energy to knock out the entire US's power grid?
Sexual vs. asexual reproduction vis-a-vis early evolution
What are the colors of human cone cells?
triplicate carbon copies' carbon footprint
Are there more/fewer/equal quantum fluctuations near massive bodies?
Identify the fishes
Jungle versus machete
does cured cyanoacrylate penetrate skin if dissolved in acetone?
Sun dogs
Carnot efficiency
Why the south is hotter?
HCl NaOH titration
Wikipedia:Reference_desk/Archives/Science/2012 April 11
why phenolphthalein instead of bromocresol blue
The powder coating process
Impossible colors
Why don't they place neutron absorbants under nuclear reactor cores?
Use of anova/ F-tests with count data
Magnesium citrate
Gauss' principle of least constraint
furnace fumes
science
Wikipedia:Reference_desk/Archives/Science/2012 April 12
will aluminum foil scratch a lens or its coating?
Boyle temperature of Argon
unhealthy food combination
Fluid properties of blood
replacing wheels with balls in a car.
What is the expected operating lifetime of a modern coal-fired power station??
Identify rabbit photos
Brodatz texture dataset
The glue binding new and unused staples together. What is it?
how hot does it take for Titan to heat up to completely lose its atmosphere
Wikipedia:Reference_desk/Archives/Science/2012 April 13
Fermented milk?
Neurology
Do sensory organs evolve to be too small to have sex with?
Stale Petrol
Wikipedia:Reference_desk/Archives/Science/2012 April 14
Difference B IntraCrin & AutoCrin?
Health effects of too much magnesium intake
Atoms in a current
Co-codamol
What is PTH (electronics, resistors)?
PU sections occurence and toxcicity
Pseudo science
Hydrons
Wikipedia:Reference_desk/Archives/Science/2012 April 15
What is the big ball on most wheellock pistols?
Can a laptop battery improve?
Physics
GMO Docs
loading dose question
Wikipedia:Reference_desk/Archives/Science/2012 April 16
Saving the Titanic
Spartan by Wavefunction Inc.
Consequences of not chewing food properly.
Red leaves
Running at 2000 feet altitude
Owl rotation
Wikipedia:Reference_desk/Archives/Science/2012 April 17
obviously pseudoscience that ended up completely right?
Regarding effect of an AC signal on a BJT.
Snow patterns
Viruses/disease symptoms
Wikipedia:Reference_desk/Archives/Science/2012 April 18
Identify the monkeys
Which water is better for boiling and drinking, water from toilet tap or water from kitchen tap?
capillary waves
how is this safe
conker tree
preserving seeds
do kids with progeria get very smart very fast
Wikipedia:Reference_desk/Archives/Science/2012 April 19
Peat pod fungus
Finland's class size ratios
Tohoku earthquake's shift
If the drag coefficient is not constant then what is the point of the equation?
Fluorine(I)
Difference of diesel, bio-diesel, ethanol, gas and gasoline
Helicopter and aircraft pilots record flying hour holders
Wikipedia:Reference_desk/Archives/Science/2012 April 20
Bleach and chlorine
Mechanics problem
Hail
regrading r-e model of a BJT
Environmental effects of a plastic bag ban
How many people alive today were born before the year 1900?
Inside of a hen it's too ... whatever ... to breathe
Does water ice get colder or is it temperature static?
How can Mars acquire to more substantial atmosphere over sun's brightening
Europa's atmosphere
Why Earth dies Mars survives
Wikipedia:Reference_desk/Archives/Science/2012 April 21
Is US or UK ahead in commercial transportation fuel synthesis from CO2?
ban all plastic bags ... and then?
Insect ID
~ Health-Related Questions: For Only Knowledge & Experienced People of Excellence Only ~
Odd tree growth
alternative explanation
Vactrain effects
Biomorph-producing fractal formulas
Wikipedia:Reference_desk/Archives/Science/2012 April 22
Caffeine in Nesquik
Flying car
High buoyancy and low drag
Some Science questions
Cholera rates in Kenya
Wikipedia:Reference_desk/Archives/Science/2012 April 23
Chemistry/Amylose and amylopectin Determination.
Kills 99 per cent of germs...
Quantum entanglement and kinetic energy
Female scientist question
Population growth vs accelerating returns in technology
Carmine microbial production
Some Biology questions
what is the year old of the donkey when it begin to bray?
Wikipedia:Reference_desk/Archives/Science/2012 April 24
Curlews?
M notation in chemical reactions described for rate data
Diamminehydridoboron(0) [BH(NH3 )2
Simplest being to show affection
Hermaphroditism
To become supercentenarian
Photoelectric effect- why Kth shell??
GPS or Glonass which came first
Electric motor and heat
trial
Global warming and Mexico
Wikipedia:Reference_desk/Archives/Science/2012 April 25
pH Determination
Chemical kinetics - why no 2nd order reaction data?
Inappropriate paint
europa europa
Bicycle wheel spoke breakage load question
Wikipedia:Reference_desk/Archives/Science/2012 April 26
what is dark matter
the source of planets' atmospheres
Electric Field & Electric Force
for how long duration of time the sun was T-tauri star
Blue glow when pulling apart a Band-Aid wrapper?
How do they make large, curved sheets of glass?
Color change
Wikipedia:Reference_desk/Archives/Science/2012 April 27
Mean motion orbital resonances discrete?
Monk's hood oil feeling
Molecular sieves
I can't find species "Aphenops cronei" that was mentioned by Dobzhansky
Event horizon of universe
Unranked taxa
Suppose we have a Magic Mosquito Genocide Contraption
Decision-making - Can we actually make decisions?
photoelectric effect - electron from K shell why?
If you were to pick one decade that the telephone became 'mainstream'...
~ Health-Related Questions: For Only Knowledge & Experienced People of Excellence Only ~ [NOT SLOVED]
Wikipedia:Reference_desk/Archives/Science/2012 April 28
The new "Xi_b^*" baryon
What is this black substance ?
Freezing
Permanent marking of stolen clothing
Aquifer drawdown and cloud cover.
sodium metasilicate
Wikipedia:Reference_desk/Archives/Science/2012 April 29
How do I mimic static over the cellphone?
A Fibres in Frog Sciatic Nerve
Gravity
Why were the X-15 rocket-powered aircrafts retired?
Preventing water damage when building a building
Niagara falls into dam
What are typical Power capacities for suburban Distribution Substations??98.225.64.151 (talk) 23:13, 29 April 2012 (UTC)
Leftover rabies?
Wikipedia:Reference_desk/Archives/Science/2012 April 30
Fibrosis
Kinased oligonucleotides
How many neurons can fire at once?
Hydraulics/Pressure question
fever to being cold
Parasitic pepper twin ?
Engineering at university
highest decibel rating of any fling insect.