Barney Calhoun is a character in the Half-Life series, in Half-Life 1 he was a security guard for the Black Mesa facility. In Half-Life 2, he is working as an inside man for Doctors Isaac Kleiner and Eli Vance, spying on the Combine.

No it is not. It requires one of the games in the half life 2 series such as TF2 portal or half life 2.

Gordon Freeman

Half life one is more arcadish and was the first in the series, although Half Life 2 is much better. Truly it is if you want to go by the story line or just play because of the fun

If you wanna play for fun go with 2, if you wanna play with a good storyline go with 1 first and then 2

You can buy Half-Life 2 and it's episodes at most stores that sell games.However,Steam,a major internet shopping program,allows you to buy all of the Half Life series.

1/8 amount of the element will reamain.

After 1 half-life there is 1/2 left

After the 2nd half-life there is 1/2 of 1/2 left which is 1/4

After the 3rd half-life there is 1/2 of 1/4 left which is 1/8

After one half-life, half of the radioactive sample remains. This means that the remaining fraction is 1/2 or 0.5 of the original sample.

The half-life of an isotope is the time it takes for half of the radioactive nuclei to decay. It is a measure of the stability of the isotope and can vary widely among different isotopes. The concept is commonly used in radioactive dating and nuclear physics.

Buy Half Life: Source Or Buy Garrysmod a Half-Life 2 Modification and get the addon "Half-Life Rennaisance" Link to Half Life Rennaisance: http://www.garrysmod.org/downloads/?a=view&id=57033 Enjoy!

Half life is pretty much self explanatory in that after they go through 1 half life half of the radioactive decay remains.

1/2 x 1/2 x 1/2 = 1/8 = 0.125 = 12.5%

or you can divide 100% by 2, 3 times and you'll get 12.5%

The half life of the most important isotope of berkelium - 247Bk - is 1 380 years.

Valve Software made the Half-Life series. They also created many other games like Left 4 Dead and Portal.

The half-life of Alli (orlistat) is around 1 to 2 hours. This means that it takes about 1 to 2 hours for half of the drug to be eliminated from the body.

The half-life of penicillin varies depending on the specific type. For example, the half-life of penicillin G is typically around 30 minutes to 1 hour in the body. Penicillin V, another common type, has a slightly longer half-life of around 1 hour to 1.5 hours.

He is the main character of the Half Life series made by Valve.

A half-life means half the original matter decays and is gone after that period. Something with a 3 hour half-live will have only 1/2 its amount left after 3 hours. After 6 hours, only 1/4th is left, and after 9 hours, only 1/8th is left. After one half-life, half is gone. Half is left. After another half-life, half of the remaining half is gone, leaving one quarter left. After the third half-life, half of the quarter is gone and half of that quarter remains, which is an eighth of the original.

As long as the Half-Life games makes Valve some money, they won't change a winning recipe. So, there will almost for sure be another Half-Life game.

yes the first half life was a great success and so where the expansion packs for the PC. The sequel game Half life 2 has also been a huge success and so have ep 1 and ep 2, and soon there will be a ep 3

Half Life 2 episode 3 will be the last in the series, Half Life 2 Ep 1, 2 and 3 are actually Half Life 3, Valve split the game into three so that it wouldn't take them 6 to 10 years to make life Half Life 2 did

The half-life is the time that it takes for 1/2 of a material to decay.

Decay Series

Half Life 2

Half Life 2: Episode 1

Half Life 2: Episode 2

Portal

Team Fortress

Hope this helps ;)

You can't, but Half Life 2 Episode 3 supposedly has it.

Not sure what you mean by "had-lives". After 3 half lives, approx 1/8 would remain.

in series 1 450 in series 2 650

you start with half life 2, then you play half life 2 episode 1, then you play half life 2 episode 2, so you are basically playing them in the order they are in at the game select screen (where you choose any of the half life games, portal or tf2)

no, you buy it, cheapo

Very, very good!

1/2 (50%) of them.

Yes, an isotope is still radioactive after one half life. There is simple one half of it left. And there will be one half of that half, i.e. one quarter left after a second half life, and half of that half, i.e. one eight left after a third half life, etc. The equation for half-life is ...

AT = A0 2(-T/H)

... where A0 is the starting activity, AT is the ending activity at some time T, and H is the half-life in units of T. Sometimes, you see this equation in other forms, such as with e instead of 2, but there is another factor in the exponent. They are all the same. This equation, with the 2, makes the meaning of half-life clear because a negative power of 2 is simply 1/2, 1/4, 1/8, etc.

The half-life of nitrofurantoin is around 1 hour. This means that after 1 hour, half of the drug is eliminated from the body. The short half-life of nitrofurantoin requires frequent dosing to maintain effective levels in the body for treating bacterial infections.

No, you cannot spawn monsters in Half-Life 1 through normal gameplay. The game progression does not involve a feature to directly spawn monsters.

Sabrina's Secret Life - 2003 Half There 1-12 was released on:

USA: 16 December 2003

No, it is not. If a radionuclide has a half-life of 1 month, half is gone after 1 month. Half of the half that is left will be gone after 2 months, and that will leave 1/4th of the original amount left after the second month.

Half-Life, Half-Life: Blueshift, Half-life: Opposing Force, Half-life: High Definition pack (might not classify as a game), Half-Life: Source, Half-Life 2, Half-Life 2: Episode 1, and Half-Life 2: Episode 2. Eight games total not including countless mods created by fans that you can download for free on moddb.com and fileplanet.com. Other games by Valve software include Left 4 Dead, Left 4 Dead 2, Portal, Portal 2, Counter Strike, Counter Strike: Source, Team Fortress, Team Fortress 2, and Alien Swarm.

Another Half-Life game would be Half-Life: Decay. You might also be able to count Half-Life Deathmatch and Half-Life 2 Deathmatch.

The half-life of Lasix (furosemide) varies depending on factors such as age, kidney function, and dosage. On average, the half-life is around 1-1.5 hours in adults with normal kidney function.

The series represents the chimes of a clock. Every half-hour, it chimes once, every full hour, it chimes according to the hour.

The series represents the chimes of a clock. Every half-hour, it chimes once, every full hour, it chimes according to the hour.

The series represents the chimes of a clock. Every half-hour, it chimes once, every full hour, it chimes according to the hour.

The series represents the chimes of a clock. Every half-hour, it chimes once, every full hour, it chimes according to the hour.

After 20 minutes, there have been 4 half-lives (20 min / 5 min per half-life). Each half-life reduces the sample by half, so the fraction of the sample left after 20 minutes is (1/2)^4, which is 1/16. Therefore, 1/16 of the original sample is left after 20 minutes.

yes, there is but its not on its own it comes in a bundle with all the 'half life' series, & 'portal 1'. its called 'orange box'. well worth the money.

This depends on the type of material. Uranium-238's half-life is 4,438,000,000 years. But the half-life of a material such as Radon-218 is only 35 ms. There is a great range of half-lives for a wide variety of isotopes, so it is impossible to generalize. If you're asking what a half-life is, it is the amount of time it takes for half of any quantity of a radioactive isotope to decay. So if you had a 10g pile of Uranium-238, after 4,438,000,000 years, only 5g of it would still be Uranium-238. The other half would've decayed.

Cobalt-60 has an 1/2 life of 5.24 years

It depends on the half life of the isotope. If the half life is, for example, 10 minutes, then 1/8 of the parent isotope will remain (30/10 = 3; 1/2^3 = 1/8).

Essentially, to work out the remaining fraction, you firstly divide the period of time by the half life (the answer in this case is X), and then do 1/2 to the power of x.

Yes, they are all different games; episode 1 follows on from hl2, and episode 2 from one.

The Other Half - TV series - was created in 2001.

Tradition. By the way, the "quarter-life" (when 1/4 of the original substance is left) would be exactly two half-lives.

Tradition. By the way, the "quarter-life" (when 1/4 of the original substance is left) would be exactly two half-lives.

Tradition. By the way, the "quarter-life" (when 1/4 of the original substance is left) would be exactly two half-lives.

Tradition. By the way, the "quarter-life" (when 1/4 of the original substance is left) would be exactly two half-lives.

1/2 of what is left.

yes along with half life 2 half life episode 1 and 2 and portal in the orange box

No. Half Life: Opposing Force does not require neither Half Life nor Half Life: Blue Shift.

9 years.

The half-life of a radionuclide is the period of time that half of its mass will decay into something else. On the surface, that is simple enough. Making it a bit complex, however, is that half-life is logarithmic, meaning that half of the mass remains after one half-life, and then half of the remaining half, i.e. one quarter, remains after the second half-life, and then half of the remaining quarter, i.e. one eighth, remains after the third half-life. The process continues semi-infinitely, with the pattern 1/2, 1/4, 1/8, 1/16, 1/32, 1/64, etc.

The equation for half-life is ...

AT = A0 2 (-T/H)

... where A0 is the starting activity or mass, AT is the ending activity or mass at some time T, and H is the half-life in units of T.

There are other versions of this equation, but they all work out to be the same. They usually involve a power of e, instead of a power of 2. The advantage of using this equation, with the power of 2 (actually the inverse, because of the negative T), is that you don't have to remember the 0.693 factor, and because it directly corresponds to what is actually happening, making it easy to memorize.

Given that 45% of the original amount remains after 80 minutes, we know that 55% has decayed. Therefore, the substance has gone through 1 half-life so far. To find the half-life, we use the formula: Remaining amount = Original amount * (1/2)^n, where n is the number of half-lives. Substituting the values, we get: 0.45 = 1 * (1/2)^1. Solving this equation gives us a half-life of 80 minutes.