Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and the Yahoo Answers website is now in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.
Dick
Where did the moon get it's tritium?
What process created the tritium that is on the moon, and where did that process take place?
2 AnswersAstronomy & Space2 weeks agoWhy do adults lose their fear of the dark?
It makes sense that children fear the dark: night is when predatory cats come out. It only makes sense that vulnerable prey animals should evolve some kind of repulsion towards darkness.
But why do adults lose that fear? Adult humans are vulnerable prey animals that cannot defend against lions, tigers, and bears.
13 AnswersZoology2 months agoWhat beers have a lesser affect on Gout?
I'm looking for a peer that is either purine-free or has a dramatically reduced affect on gout.
It needs to taste great too. Just so you have an idea, the person loves stouts, but thinks light beers like Bud and Michelob taste like piss-water.
3 AnswersBeer, Wine & Spirits4 months agoHow long should I wait after lifting before working out a different body part?
Most humans exercise one body part (back) or one group (back + bicep) and then wait 24 hours before exercising a different part/group. Even though the human will be using a different body part, they have to wait. Why, chemically? What specifically needs to recover? Glycogen stores? Creatinine? Hormones? It is not the case that humans wait for lactic acid to dissipate, because lactic acid only effects one muscle group at a time. It seems run out of "energy". What is this "energy"? How can this energy be more rapidly recuperated? Is it viable to exercise once every 16 hours instead of once every 24 hours?
I'm looking for specific answer, please.
Praise Satan.
1 AnswerDiet & Fitness6 months agoDoes donating Plasma feel the same as donating Blood in terms of light headedness?
I get very light headed when donating blood, but only towards the end of the process. But it is my understanding that the majority of blood is put back in your body. I imagine this would mean less light headedness. Am I correct?
Also, is the blood gradually put back into your body as the process goes on, or do they wait to the end to put the de-plasmated blood back into your body?
Tanks
2 AnswersMedicine6 months agoWhy did Tesla sell bonds?
Was it to raise capital for a project? Make the company eligible for S&P 500?
I'd like to know your reasoning too.
Thanks!666
2 AnswersInvesting8 months agoDoes pascal's principle apply in a moving fluid?
2 AnswersPhysics8 months agoExplain Bernoulli's equation?
Specifically, why does velocity increase and pressure decrease when cross-sectional area decreases?
I know it's a consequence of the equations, this I fully understand.
I would like to know why this happens though.
Thank you.
1 AnswerPhysics8 months agoDoesn't Bernoulli's Principle contradict Pascal's Principle?
Fluid enters a large pipe at pressure P. One meter later, the pipe has a smaller diameter.
According to Bernoulli's Principle, the velocity at this point increases and the pressure decreases.
BUT according to Pascal's Principle, the applied pressure should be felt everywhere.
Is there no contradiction because Pascal's Principle only applies to confined fluid, while Bernoulli's Principle only applies to dynamic, unconfined fluid?
1 AnswerPhysics8 months agoPhysics: how do you write your v's to distinguish between Volume and velocity?
Other than capital and lowercase.
Especially when writing fractions, if I have a "v" in the numerator or denominator, I often can't tell if it's a capital or lowercase.
So do you have any tricks to help yourself?
An analog could be p's with momentum and density. I write momentum as a normal "p", and I write density with a small curve at the bottom of the "p" (yes, I know it's called "rho").
Thank you.
2 AnswersPhysics8 months agoWhat is the total advantage (mech adv * hydraulic adv) called?
If a hydraulic jack has a Mech.Adv. of 10 and a Hydraulic Adv. of 4; the total advantage of the system is 40. What is this "total advantage" called in engineering?
1 AnswerEngineering8 months agoHow is the oil reservoir in a hydraulic car jack kept unpressurized?
2 AnswersEngineering8 months agoWhat is the symbol for buoyant force? I need a reference.?
2 AnswersPhysics8 months agoWhy can some objects become partially submerged?
Objects with specific gravity between 0 and 1 become partially submerged in the respective fluid. Why don't they either just sink of float completely above water?
What mechanism of force or energy demands that hydrostatic pressure remains constant (at any given depth).
1 AnswerPhysics8 months agoHow is the oil reservoir in a car jack kept unpressurized?
Is there a component/sub-assembly that allows air into the top of the oil reservoir during the upstroke of the lever arm?
Also, is there another name for "upstroke"; I mean "the stroke of the lever arm which causes the pump piston/pump plunger to fill with hydraulic oil"?
Thank you in advance!
Engineering8 months agoWhy does the Upward Hydrostatic Force of a submerged object = Fg of the water column above it + Fg of the volume of displaced water?
I would imagine the Upward Hydrostatic Force to be equal to Fg of the water column above it + Fg of the object. This is because my brain tells me that the upward hydrostatic force is just like normal force:
All that is pressing on the bottom of the submerged object is the Fn of the water above it and the Fn of the object itself.
Specifically, why is it NOT the case that Upward Hydrostatic Force equals Fg of the water column above it + Fg of the object?
Please don't just say "pressure increases with depth", that's no help. I need an intuitive understanding here. What is propelling the object upwards on a molecular level?Thank you.
1 AnswerPhysics8 months agoWhy do humans float when their specific gravity is greater than 1?
3 AnswersPhysics8 months agoBuoyancy - I do not understand how the fluid on top of a submerged object "pushes up" on the submerged object?
I understand that buoyant force only depends on weight of displaced fluid - not depth - because the deeper you go, the more fluid is pressing on top of the object, but also the bottom of the object, and therefore cancels out.
I do not understand how the fluid on top of the submerged object "pushes up" on the submerged object.
Thank you.
2 AnswersPhysics8 months agoWhy is Physics separated into Physics 1 and Physics 2?
Usually Phys 1 = Classical Mechanics and Phys 2 = Electricity & Magnetism.
Why are they not usually the same class?
6 AnswersPhysics9 months ago