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half life
I'm pretty sure your asking what it means when people ask if the glass is half empty or half full? If Not Sorry, But If That Is Your Question Then The Answer Is That People Ask That To "See If You Are A Positive Or Negative Person", If You Believe The Glass Is Half Full, Then Your A Positive Person, If You Believe Its Half Empty, Your Supposedly A Negative Person. Does That Help? I'm a different person from the first, but every time someone asks me that question, I'll look around wildly and yell, "Who is drinking my soda!?!?!" *Half empty is when something was full at one point in time and it has been drained since to a "half empty" status. Half full is when you are filling something and plan to continue to fill it. Another view - If you look at it as just a glass with water in it then that's what it is. If you put meaning into it then the glass will always be completely full. How full do you want your glass?
Use the formula t = 2*pi*sqrt(l/g)
There are 60 seconds in a minute, so a half minute would be 30 seconds. If you have a length of time in half minutes, multiply that by 30 to get seconds. For example, 20 half minutes = 20 x 30 seconds = 600 seconds
Since the period of a simple pendulum (for short swings) in proportional to the square root of its length, then making the length one quarter of its original length would make the period one half of its original period.Periodapproximately = 2 pi square root (length/acceleration due to gravity)