Half-Life: Alyx team AMA To All New & Old Players of the Franchise - r/HalfLife Welcome Guide by /u/Nobiting Requirements for Half Life: Alyx What order should I play the Half-Life games in? The Best Singleplayer Mods Guide by /u/Dune_Jumper Marc Laidlaw's Epistle 3 with Real Names by /u/Gondile Where is Half-Life 3? These Things, They Take Time. Offenders of these rules may be banned without warning. Any posts containing spoilers must be marked as spoiler using Reddit's built-in spoiler warnings. Posting unmarked spoilers or leaks of Half-Life: Alyx will result in an immediate ban.Do not pass other's work off as your own. When posting fan generated content, try to credit the original artist and link to the primary source whenever possible. It is first seen in Half-Life for a few seconds during the Resonance Cascade, orbiting behind two Bullsquids drinking from a Healing Pool.Posting uncalled for materials may result in an immediate and permanent ban. All other NSFW posts and comments must be tagged. Stalking, harassment, witch hunting, trolling, brigading, ddosing, or doxxing will not be tolerated and will result in a ban. No personal information, in posts or comments. Personal attacks, bigotry, fighting words, otherwise inappropriate behavior or content, comments that insult or demean a specific user or group of users will be removed. FREE version: it will work as a search engine and management. The App works in two versions: FREE and SUBSCRIPTION. The subscription based license system avoids dealing with browsers, payments and download links. All posts and comments must follow Reddiquette presents its own desktop application, to bring the best sounding high-quality sound effects directly to your workflow.Please submit posts of this nature to to r/HalfLifeLounge. image macros, "One-liner" jokes), streams, generic Let's Plays, reposts, spam, rants, etc. Low-value submissions that may detract from meaningful discussion are not allowed. Important Valve and Steam news may be allowed per Moderator discretion. Submissions must be directly related to the Half-Life franchise.We have a few light rules to keep discussion upbeat and interesting, check them out below! You've come to the right place to discuss Half-Life. You have chosen, or have been chosen to subscribe to our subreddit. If there are 100 g of cobalt-60 in a sample, how much will be left after 15 years?ġ5 years is three half-lives so the fraction remaining will be \((\frac = 12.5g\)Īs a ratio of what was present originally compared to what was left, this would be 100:12.5 or 1:0.Welcome. So suppose a sample has a count rate of 3,200 Becquerel (Bq) at the start, what its count rate would be after 8 days would be 1/16th of 3,200 Bq = 200 Bq. So if the half-life is two days, four half-lives is 8 days. This could then be incorporated into other data. a ratio - given in the form 'activity after n half-lives : initial activity', in this case 1:16.a decimal - 1/16 = 0.0625 of the original sample.a fraction - a ½ of a ½ of a ½ of a ½ remains, which is ½ × ½ × ½ × ½ = 1/16 of the original sample.This could be stated as a fraction, decimal or ratio.įor example the amount of a sample remaining after four half-lives could be expressed as: It should also be possible to state how much of a sample remains or what the activity or count should become after a given length of time. Calculating the isotope remaining - Higher If a sample of a tree (for example) contains 64 grams (g) of radioactive carbon after 5,730 years it will contain 32 g, after another 5,730 years that will have halved again to 16 g. The half-life of radioactive carbon-14 is 5,730 years. This process continues and although the count rate might get very small, it does not drop to zero completely. A third, two-day period from four days to six days sees the count rate halving again from 20 down to 10. Note that this second two days does not see the count drop to zero, only that it halves again. Several months after his departure he gave an interview to Arcade Attack. It takes another two days for the count rate to halve again, this time from 40 to 20. Valve’s long-term writer Marc Laidlaw left the company in January 2017. The illustration below shows how a radioactive sample is decaying over time.įrom the start of timing it takes two days for the count to halve from 80 down to 40. Count-rate is the number of decays recorded each second by a detector, such as the Geiger-Muller tube. Half-life is the time it takes for half of the unstable nuclei in a sample to decay or for the activity of the sample to halve or for the count rate to halve.
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