vrus

You can estimate it.

 

Consider that one keystroke will take up precisely 1 byte' date=' and say that the average typing rate is about 35 wpm (quite fast). The average word in the English language is about 5.7 characters in length (can't remember where I got this one, but it's about reasonable). So if you were to type 35 wpm you'd be consuming about 200 characters per minute which translates to 200 bytes/min.

 

So, if you had a 512mb flash drive onto which you stored the information, then you'd be able to log everything a person typed into a computer for the next 2.68 million seconds - roughly equivalent to 745 hours or 31 days. And that's if the person was typing continuously for that amount of time

 

The answer is: quite a lot [/quote']

 

Nice calc.

 

But these keyloggers also take screen shots; that would surely be more than 1 byte ?

 

In that case wouldn't the memory be used up quicker ?

 

Thanks for all the gyan on this topic ppl. This thing is a big privacy violation in my opinion, despite any good uses it has...

 

You're right about the hardware thing CanadaAotS

So how much memory could these hardware keyloggers store on average ? Everything from the time you started ur pc the first time ? Formatting affects them ?

RyanJ why don't you get some qualifications yourself and start your own business like those mentioned by YT ? That would be kinda cool!

Happy Birthday!

Thnx 5614..

And happy birthday vrus.

Thnx again Phi.

And besides people, it wasn't a friend, just someone i know, who must have some trouble ! I was just interested in some background info.!

And RyanJ I know how to open MS-DOS

Can someone tell me what prompt is? A person I know told me that it has something to do with saving everything that has been typed in a computer... I don't believe this, as the computer can't possibly hold all this data...

So I am curious to know what exactly it is. I know it has something to do with MS-DOS.

Also if such a program that saves everything typed does exist or saves all the actions taken, what would it be and how can it be altered ?

In case you're wondering, no im not in trouble or anything..

Thnx.

Plus, its my birthday today...

I'd like to draw attention to Russia, about whom i am doing a depth study for my IGCSE History... (the first half of the 20th century)

We were going through Nicholas II's life and the three groups that wanted change, namely the Socialist revolutionaries, socialist democrats and the liberals.

The Sr wanted to employ terrorism to knock the tsar off. Obviously they became illegal. But it is worth mentioning that the tsar himself almost always resorted to violence and terrorism to put down problems. Isn't it funny how when the government uses terrorism, it is not 'terrorism', but when anyone else does the same, it is ?...

I would say terrorism is a valid tactic in war if and only when the enemy employs cruel, ruthless and inhuman tactics themself. It must not be used to begin with. Let me provide an example again. It has been confirmed that pakistan has terrorist camps in Pakistan occupied kashmir. They are training individuals blinded by patriotism and relegion in terrorising and sending them 'over the top' to Indian administered kashmir. Despite evidence, pakistan denies the existence of these camps. As an impartisl viewer, i feel this catastrophe in action is not given nearly enough attention that is required. What do you all think should be the next course of action ? I'm not trying to make this an India-pakistan debating thread , but i feel this relates with the topic.

As an impartial viewer to this situation, i would reinforce what i have said before and say that India should take similar action and counter terrorism with the same. Thanks for hearing me out !

Group' date='

 

The recoil effect is an interaction of masses and applied force. If the projectile has very little mass the recoil effect is small, as compared to a larger mass.

There is also a 'trade off' with the force applied. If the projectile has very little mass but the force is very large the recoil effect will still be considerable.

The faster a given mass accelerates the more force is required to continue the acceleration. It's as if the mass of the object increases with velocity.

 

The recoil effect can be suppressed by using the counter emf of the charged coils to cause a push and pull effect on the projectile as oppossed to a singular or continuous push or pull effect. This would reduce the net effect on the mechanics to near zero.

 

Such a device placed in space perhaps in a shaded area would negate the need for supercooling the coils(-400F), there by conserving weight and electrical power. It should also be possible to not use rails as guides so long as the projectile is introduced into the center of the coils in a microgravity environment.

 

It' seems that outer space is the only practical place to use this device, now the question is... for what purpose?

 

K[/quote']

 

Have you heard of the american star wars project ? Vaporize incoming ballistic missiles in mid-air... Rail-guns are one option. They can also launch satellites into orbit from earth. maybe, provide an initial momentum for interplanetary probes...

Magnesium with steam ? I liked that one...

How bout some grp.I with water... or maybe acid

Depends on the electrode material and anions in solution. At the cathode you can expect formation of hydrogen, at the anode the metal forms hydroxides, or oxygen is produced if the anion is not broken down.

So the hydroxide will react with the anode ?

Oh and what if you used silver as the electrode ? Inert ?

I gave some of the sample to my friend who had obtained some universal indicator paper. He tested it and told me the pH was 8...

What would happen if you electrolysed weak alkalis ?

But' date=' the brownish solution you have right now may also work for you. Let the brown stuff settle at the bottom and I think you'll be left with a pale yellow/brown solution. The problem with this, however, is that the brown color interferes with the really nice and bright colors of the red cabbage indicator.[/quote']

 

Yeah. I kept decanting until i didn't have any solid left at the bottom and my solution is brown. Its eid here so ive got a short holiday. I'll get the indicator ready soon....

I finally got an alkaline solution!

I heated Baking Soda until it turned to a black looking powder. Then I added small quantities of water. The solution was brownish. After the tube had cooled down, well.... I was trying to keep it somewhere and a little spilt on my fingers and it felt sopy and a bit strange!

Thanks for the help woelen!

I'll get some red cabbage for the indicator and test it out on Friday probably!

You can buy it at a supermarket as washing soda. Heating sodium bicarbonate also works. After it has decomposed' date=' dissolve it in a small amount of water.

You can also mix NaOH and NaHCO3.

 

As far as I remember, a concentrated solution of Na2CO3 has a pH somewhere near 11, which is quite alkaline already. If you want really strong alkalinity, use NaOH. NaOH however is quite corrosive and exceedingly dangerous for the eyes. Be careful![/quote']

 

I didn't know that washing soda was alkaline! Do you have to dissolve it in water and then drive off some water or what ? Where I live, you only get the bare necessities required for a happy life without any scienctific stuff. So I have learnt to make do....

Very alkaline (NaOH and very concentrated Na2CO3) makes it yellow.

That must look awesome! How can you get concentrated Sodium Carbonate ? I heard heating the same's bicarbonate gives the carbonate. How alkaline would it be then ?

What is Sulphur's function in the mixture ? Is there anything commonly available that can replace Potassium Nitrate ? (And Sulphur)

I was in need of much of the same information. Thnx to both of you.

Can someone instruct me on how you could possibly make an indicator at home and what colour could be observed in different media of varying pH ? I have hardly any chemica supplies, so this might be a good start!

A did a practical at school 2 years ago on making indicator with red cabbage, but I forgot the procedures and requirements. Also can anyone tell me the steps required to make and indicator in order ?

What's Universal Indicator made from ?

Thnx in advance!

Correct me if I am wrong. Temperature indicates the amount of Kinetic energy possessed by the paticles of the substance in a volume. For example, in a gas, as the particles are always moving randomly (Brownian Motion) they collide with each other and/ or the inner surfaces of their container. If they collide with each other they transfer their kinetic energy, slowing themselves down, but speeding up the one they collided with, so it evens it out and the AVERAGE kinetic energy remains them unless affected by other factors. So you can never really know a molecule's energy as it will change constantly. If you evaporate water, those molecules at the surface requires lesser energy to become vapour than those below it. If quite a few molecules leave the vessel of water, the avergae kinetic energy falls considerably enough and the water's temperature decreases.

H2 and O2 can also be kept as a mixture and be relatively stable. If you have pure H2 and pure Cl2 mixed together, UV light (a.k.a. sunlight) will overcome the activation energy barrier and cause it to violently start reacting. (It's actually kind of neat to see).

What would the temperature range be ?

What might happen if air leaks in before or while the reaction is taking place ?

1) you end up with a sweet tasting liquid that sends your tongue white and stings for a while afterwards.

 

2) very little again' date=' but still quite sweet, although verifying this would probably land you in Hospital for corrective surgery (then prolly a Psych ward for trying it in the 1`st place!)

 

however the addition of conc Sulphuric acid to the 60% soln would certainly be interesting![/quote']

 

Nice one YT!

 

Is that 'sweet' liquid flammable ? Can it burn or explode if added to anything else ?

But if the metal displaced liquefies, won't it get oxidised by oxygen inthe air again ?

Just out of curiosity, what happens if you add sugar to 1. Hydrogen Peroxide of concentration 6 % & 2. H2O2 of concentration 60%+ ?

Thnks.

There was a project on for making a Russian space shuttle during the final soviet years. It was called the Buran. Wikipedia has a good load on it, but I'd like to know more about it.

Did they have to cancel it ? Couldn't they have suspended it and resumed it when their economy was not crumbling ? Maybe now ? Because, I think if it was operational, the ISS would have been finished for a while now as it can carry a larger payload than its american counterpart.

Maybe when I'm his age space travelling would be as common as travelling by airplanes right now - extremely slim chance' date=' but one can hope...[/quote']

 

Its not a maybe. There is quite a high chance of it ...

But it also depends how old he is ! How old is he ?