What do you want to know thread to make you smart and read good.

kjl

biko wrote: »

If every cell in the body is replaced after 7 years, why do tattoos not vanish?

If the umbilical cord provides the baby with blood, why isn't there a vein/artery behind your belly button?

eh, the umbilical cord does not give the baby blood, if fact mother and baby can have two clashing blood types.

It BeeMee

biko wrote: »

If every cell in the body is replaced after 7 years, why do tattoos not vanish?

Indeed, why can't scars be programmed not to replace?

Knockmealdown Shepherd

El Guapo! wrote: »

If you drilled a hole straight down through the earth from top to bottom, and threw a ball down, would it....

Stop in the middle?

Go straight through?

Bounce up and down from pole to pole?

Something else?

http://www.damninteresting.com/the-gravity-express/

The above link will answer your questions

wretcheddomain

Fussgangerzone wrote: »

Maybe a Japanese Spider Crab?

Here's one


edit---

Although if tentacles count as legs, it'd be a "colossal squid", and I don't think you could be called names for being scared of those.

I think you should be more scared of one of these, apparently 1g of its poison can kill 15,000 humans:

:eek:

Raphael

NiallSparky wrote: »

Not as far as I'm aware. Newton's law of universal gravitation doesn't really suggest so.

Not so much, actually, those laws don't take into account spinning. The impact is minimal enough to be negligible, though.

Centrifugal force is calculated according to this formula: F = m*r*omega^2, where m is the mass of the object,r is the radius of rotation, and omega is the speed of rotation.

Now, lets get this in terms of m - sub in r=6.3675e6 (radius of earth) and omega =7.27e-5 (rotational speed of earth in rad/s) Multiply it all together and you get F = .03365*m.

If we recall how to calculate weight, i.e. the force due to gravity, it's F = m*g = 9.8*m. Correcting that for Centrifugal Force gives us Fc = 9.76635. Which makes approximately bugger all difference.

And before anyone asks the obvious question, in order to negate gravity entirely, the earth would ahve to spin at 0.00124059 rad/s, which is an 84 minute day.

tim3000

Garzard wrote: »

What colour is a mirror?

Apparently slightly green in colour. If you put 2 mirrors in front of each other there is a slight greenish tinge in their reflections.

Celly Smunt

krudler wrote: »

I've always wondered if animals have an inner monologue like we do, and if so is it in barks, or miaows, or whistles, or whatever type of noise they vocally make.

My collie can comprehend hundreds of words through gestures and items just like humans.For all we know what's stopping them picking up English?

For example,if my dog sees a ball how do I know he doesn't think the word "ball".If I say ball he'll get the ball.Much like a 3 or 4 year old.

wexie

BrianJD wrote: »

I think we should have a thread for the simple questions we have always wondered but never got around to asking!

Can anyone answer these?

When you are at a port and you see loads of boats anchored down and out in the water, how does the owner get to it?

Why does the external temperature gauge in a car give a higher reading than the apparent highest temperature of the day according to Met Eireann?

Car temperature sensors are designed to measure the temperature of the road surface. Which, on days like these, can be significantly higher than the air temperature.

That's what I've always been told anyways.

bmwguy

Where does your lap go when you stand up?

krudler

bmwguy wrote: »

Where does your lap go when you stand up?

Same place your fist goes when you open your hand.

Stone Deaf 4evr

where do ice cream vans go in the winter?

tim3000

El Guapo! wrote: »

If you drilled a hole straight down through the earth from top to bottom, and threw a ball down, would it....

Stop in the middle?

Go straight through?

Bounce up and down from pole to pole?

Something else?

My understanding of what would happen is this the ball would accelerate towards the centre of the earth until it reached the centre from here it will start to slow down as it is now moving farther and farther away from the centre. It would not shoot out the other side. If memory serves it takes 42 minutes (or so I have heard) However if you drilled a hole from Moscow to London and dropped a ball into it would take the same amount of time (42ish mins) even though the distance is smaller the effect of gravity is reduced in proportion to this distance.

Hope that helped

maughantourig

BeerWolf wrote: »

1. How would you describe a colour to a blind person ?

2. Do blind people dream? Suppose the person was deaf as well, what then ?

3. If you had a vacuumed ball, with a mirror finish inside it and somehow managed to get a light reflecting about inside it - would it be indefinitely lit inside it ?

3. No. The light will eventually be absorbed by the mirrors and converted into heat. Unless someone can develop mirrors that can reflect light with 100% efficiency

Conmaicne Mara

Stone Deaf 4evr wrote: »

where do ice cream vans go in the winter?

I know this one! They park outside of school gates.

mattjack

Celly Smunt wrote: »

My collie can comprehend hundreds of words through gestures and items just like humans.For all we know what's stopping them picking up English?

For example,if my dog sees a ball how do I know he doesn't think the word "ball".If I say ball he'll get the ball.Much like a 3 or 4 year old.

If you say "sniff balls " , will he smell his balls ?

PizzamanIRL

Who let the dogs out?

caustic 1

Love this thread.

tim3000

When I turn on a tap at full power and then put my finger over the nozzle where the water comes out am I damaging the tap?

Celly Smunt

mattjack wrote: »

If you say "sniff balls " , will he smell his balls ?

he will tomorrow!

Daveysil15

What would be the nationality of someone born in space if the baby's parents were from different countries?

deadybai

deadybai wrote: »

I barney Gumble really Nelson Muntz dad?

https://www.google.ie/search?rlz=1C1CHMO_enIE515IE515&q=barney+the+simpsons+nelsons+father&ion=1&bav=on.2,or.r_qf.&bvm=bv.48705608,d.ZGU&biw=1366&bih=667&um=1&ie=UTF-8&hl=en&tbm=isch&source=og&sa=N&tab=wi&authuser=0&ei=81fdUaHZPNTB7AbxwoGQAg#facrc=_&imgdii=_&imgrc=wnUDIQW_DYbIbM%3A%3BfP0TnnWi40_4jM%3Bhttp%253A%252F%252F2damnfunny.com%252Fwp-content%252Fuploads%252F2012%252F12%252FThe-Simpsons-Barney-Might-Be-Nelsons-Father.jpg%3Bhttp%253A%252F%252F2damnfunny.com%252Ffunny-pictures%252Fmemes-cartoons-movies-games%252Fthe-simpsons-barney-might-be-nelsons-father%252F%3B500%3B440

omg

Ted_YNWA

How do you explain the difference between left and right to a blind person ?

dmc17

tim3000 wrote: »

When I turn on a tap at full power and then put my finger over the nozzle where the water comes out am I damaging the tap?

No, you're damaging your finger.

Karl Stein

Is an unlocked door open or closed?

kneemos

Daveysil15 wrote: »

What would be the nationality of someone born in space if the baby's parents were from different countries?

Genuine alien I'd guess.

tommyombomb

kneemos wrote: »

Genuine alien I'd guess.

Or maybe a northerner. Like N.Earth

balfe1990

Ted_YNWA wrote: »

How do you explain the difference between left and right to a blind person ?

Tap their left hand or shoulder and indicate that this side is left, and do the same for the right.

BrianBoru00

Why did kamikaze pilots wear helmets?

weldoninhio

BrianBoru00 wrote: »

Why did kamikaze pilots wear helmets?

So they weren't knocked unconcious etc before they reached their targets

keith16

Let's say a train is hurtling down the tracks at 175 kph.

Now let's say there is an innocent but yucky fly heading aimlessly toward the train at 2 kph.

The train hits the fly, who is now travelling (dead) in the opposite direction from which it came. This means that the speed of the fly relative to the train has gone from -2 kph to +175kph.

This would indicate that the fly momentarily had a speed of 0 kph. But is it really possible that during the violent collision, the fly for a split second was stationary?

bnt

Assuming the fly is a solid immutable object, then yes, for an infinitesimally-small fraction of a second. You couldn't take a photograph of a zero-second instant like that, but it's real nonetheless. If that doesn't make sense, then you haven't had to study Calculus, which was invented for problems like that.

If we drop that assumption, and model a real fly in all its squishiness, then you couldn't say that about the whole fly, but it would be true for individual atoms or molecules in its make-up. Its eyes might be going +175kph while its bum is still going -2 kph. (Splat.)

keith16

bnt wrote: »

Assuming the fly is a solid immutable object, then yes, for an infinitesimally-small split second.

If we drop that assumption, and model a real fly in all its squishiness, then you couldn't say that about the whole fly, but it would be true for individual atoms or molecules in its make-up. (Splat.)

My god. What if the train in our model was a DART and never ever turned up? Would the fly go on to live a productive and fulfilling life?

BluesBerry

tim3000 wrote: »

When I turn on a tap at full power and then put my finger over the nozzle where the water comes out am I damaging the tap?

I did this once and blew the tap right of POOF lol the pressure popped it out so yeah it can happen :pac:

Rhyme

Ted_YNWA wrote:

How do you explain the difference between left and right to a blind person ?

I've heard this one answered before, your heart is on the left, go by that.

Unless you are one in 10,000 and have the condition Situs Inversus, in which case, heart on the right.

What do you want to know thread to make you smart and read good.

What is this? A thread for ants.

bnt

Ted_YNWA wrote: »

How do you explain the difference between left and right to a blind person ?

Say "left" in to the left ear, and "right" in to the right ear.
Blind people can't see, bit they still do have spatial awareness, you know.

northernpower

biko wrote: »

If every cell in the body is replaced after 7 years, why do tattoos not vanish?

Not every cell is replaced (neurons as an example) Tattoos do fade and you can see that tatoos on skin with higher turnover fade faster (hands vs neck), but dunno how long it would take to vanish?

If the umbilical cord provides the baby with blood, why isn't there a vein/artery behind your belly button?

There are 4 'shunts' in a developing foetus which divert blood flow and close at birth, so theres no call for a blood vessel behind your belly button anymore

kraggy

Cathal Cloch wrote: »

Is an unlocked door open or closed?

Closed. Assuming it's not unlocked AND open/ajar.

Just think of what you say to someone, "please close the door". It's not locked, but the way out or in is now obstructed.

Karl Stein

kraggy wrote: »

Closed. Assuming it's not unlocked AND open/ajar.

Just think of what you say to someone, "please close the door". It's not locked, but the way out or in is now obstructed.

So when you knock on a 'closed' door and someone says 'come in - it's open' are they wrong?

kraggy

Cathal Cloch wrote: »

So when you knock on a 'closed' door and someone says 'come in - it's open' are they wrong?

Yes.

tim3000

BluesBerry wrote: »

I did this once and blew the tap right of POOF lol the pressure popped it out so yeah it can happen :pac:

Thats what I wanted to know the pressure must go somewhere

Seedy Arling

If I fart really loud in my apartment, can the people downstairs hear me?

Clandestine

^
Depends on how thin the flooring is

bnt

BluesBerry wrote: »

I did this once and blew the tap right of POOF lol the pressure popped it out so yeah it can happen :pac:

If a water flow is stopped suddenly, you can get an effect called water hammer - a shock wave that travels through the water and can do damage. That's what causes banging pipes. But if you stop the flow gradually, it's no worse than closing the tap.

mattjack

bnt wrote: »

If a water flow is stopped suddenly, you can get an effect called water hammer - a shock wave that travels through the water and can do damage. That's what causes banging pipes. But if you stop the flow gradually, it's no worse than closing the tap.

wow ... a learny person.

NegativeCreep

Why do things have where they're made written on them? Who cares if my sunglasses were made in Taiwan? :L

Derpington95

BeerWolf wrote: »

1. How would you describe a colour to a blind person ?

You can't.

Frank Lee Midere

Cathal Cloch wrote: »

So when you knock on a 'closed' door and someone says 'come in - it's open' are they wrong?

They should say its unlocked.

balfe1990

Do neo-nazis ever sunbathe with the end goal of attaining a sun tan?

FoxT

keith16 wrote: »

Let's say a train is hurtling down the tracks at 175 kph.

Now let's say there is an innocent but yucky fly heading aimlessly toward the train at 2 kph.

The train hits the fly, who is now travelling (dead) in the opposite direction from which it came. This means that the speed of the fly relative to the train has gone from -2 kph to +175kph.

This would indicate that the fly momentarily had a speed of 0 kph. But is it really possible that during the violent collision, the fly for a split second was stationary?

Why doesn't the train stop for a split second as well?

MadsL

El Guapo! wrote: »

If you drilled a hole straight down through the earth from top to bottom, and threw a ball down, would it....

Stop in the middle?

Go straight through?

Bounce up and down from pole to pole?

Something else?

I'd say the other team would get a throw-in and you'd get a yellow for unsportsmanlike behaviour.