askscience

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I know it takes two weeks for the flu vaccine to be fully effective. I assume effectiveness is zero right before the vaccine is administered, and maximum after two weeks. But is there a graph that shows how effectiveness changes in time?	1458
I am in orbit around a neutron star. I've a very powerful searchlight, which I point at the neutron star. What do I see? Shiny mirror-like surface? White matte surface? Pitch-dark surface? Something else?	1257
Suggestions for cheap fluorescent substance, to be used in science projects involving ultraviolet?	7
Modified Michelson rotating mirror experiment to determine speed of light - please criticize my modifications	6
Looking for a material which: is ferromagnetic; doesn't corrode when submerged in foodstuffs; is cheap and easily available. Stainless steel apparently is not an option, wow.	3
My turn to ask: A disk of glass is sitting outside. It's night. The air is humid. At some point, dew is formed on the disk. How can I predict when that phenomenon is just about to happen? (and what's the best countermeasure?)	2
What are some not too unusual liquids, at room temperature, that are more dense than ordinary glass? (or pick quartz instead if the variable density of the types of glass makes the question a bit imprecise)	1
Single propeller vs wall of propellers - which is more efficient?	1
You brush your teeth today, floss, and use mouthwash. After this moment, you will be fed intravenously for one year, and you will eat nothing meanwhile. You may only drink plain water, nothing else. Do you still need to brush your teeth?	1
When is insulin released in the blood? Is it when I eat something, anything? Does it depend on the taste of food? Does it depend on macronutrient content? Does it depend on blood sugar levels?	0

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