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Could anyone help me with the mechism of Electrophillic substitution of 3-chloro- benzene with a nitronium ion?! Thanks

I can not fully get my head around how direction correctional thrust on a spaceship works as to my mind there is nothing to push against, but they must work or we wouldn't be able to accurately travel...

mysticman

Hydrogen for airships

Where did they get all the hydrogen from which went into the huge airships of the early 1900's? I presume it was made chemically rather than using electrolysis, but I don't know. Such a lot of...

mormond

granite

which mineral causes the bright speckling in the granite of Aberdeen

ivanovitch57

flying upside down

i understand the aerodynamic theory of how the shape of an aeroplane wing provides lift, so how does a plane fly upside down?

Loremar

Pocket hand warmer

Hi all...Can anyone help with this query. I've been given a pocket hand warmer and was wondering if anyone could tell me how it works.It's a little plastic sachet filled with liquid and a small metal...

nix-j-c

whats outside the universe?

For the purposes of this part of the question lets say that there's one universe. If the universe is expanding, what is it expanding into? Is it the same nothingness that was here before the big bang?...

amoxon

centre of gravity in people

How is the centre of gravity measured in people. How can you imporove your centre of gravity and what happens to the body when you do?

zebra

Car oil usage, low mileage Ford Escort

Hi, can anyone help, only have a 1998 R reg Ford Escort encore 1.3 but it is immaculate, one prev owner before me (oct 07 I got it) only 46,000 full service history etc, but it uses a lot of oil, no...

devayaani

energy and force

As a concept and not involving too much of maths, can you tell me what is the difference between force and energy? Am I right in thinking that energy in action is force? Atomic forces (strong and weak...

The Sherman

just reading another psot bout aliens and it got me thinking

what if aliens landed and had the same scripture as our bible? What if they knew of Jesus christ an all and said a prophet or whatever had visited their world light years away and told them the bible...

souxie

Manifold gasket

Can a car pass an MOT with a "blowing" manifold gasket and is it an easy job to replace . The car is a 1995 Volvo 850 2 litre 20 Valve Estate,I would be grateful for any advice. Many Thanks in advance

devayaani

isotopes

Thank you for clarifying the doubts . I know chemical elements have naturally occurring isotopes. Is there any element (atomic number 1 to 92) that exists in nature but does not have any isotope ?...

badnews

Is Jesus God?

Just another question I have! Slightly confused as Jesus was born a man and speaks to God, so they cant be the same? If we pray to Our Father, Son and Holy Spirit are we praying to 3 different people...

schonovic

electricity

is anyone out there savvy enough in physics to ponder my invention, i call it an inverse heating element which is exactly what it sounds like a band of material that converts intense heat and light...

joeajay7

hydrogen

if i want to seperate hydrogen from air by any mechanical means without any expence how can i do it

Malagabob333

Space station

Went out to see the iss pass tonight 8pm.it passed from a different direction than before didnt it? more westerly than south westerly.But tonight I saw two objects on same course .Was it the shuttle?

rodz

aircract safety

Two aircraft have come down lately, one here and the other in the states with the same problem. Something to do with the iceing up of the fuel system comeing in to land, both these aircraft where...

sphinxy

Ford Ka Headlight Bulb

My daughter as a ford Ka one headlight bulb as gone she took it to a local Halfords who told her they can not fit it because the whole headlight unit as to be removed and best to take to a garage...

sjthomas11

Interior light problem on Volkswagen Bora

The interior light keeps coming on randomly whilst driving in my Volkswagen Bora, has also just come on when the car was parked. Does anyone know if this is supposed to happen, is a known fault/loose...

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