How Can We Calculate The Frequency Of Wh-questions In A Conversation Based On Certain Number Of

Why is low frequency transmitted longer than higher frequency? Why are microwaves used and not radio waves in cellular phones?

There are at least two reasons. Mainly, there just aren't that many low frequencies. As in, there's a MHz of bandwidth from 1 MHz to 2 MHz, but there's 1000 MHz between 1 GHz and 2 GHz. This matters because a single frequency doesn't convey information. To encode information you need to use a range of frequencies. To encode voice at telephone quality requires about 3-5 kHz of bandwidth. So you can only have of order 200 conversations going and you've used up all the bandwidth up to 1 MHz. You don't do that lightly because low frequencies have some unique properties that make them a valuable resource. In particular, up to about 30 MHz they'll bounce off the ionosphere and thereby travel long distances around the curve of the earth.That's the last thing you want for a cell phone, because even up in the GHz, there are so many competing applications for the spectrum that you want to make the most effective use of it. And one of the tricks that is used is cells. You divide the landscape up into small cells, each with a low power transmitter that works on a few frequencies. The adjoining cells use different frequencies to avoid interference. But a few cells over you can reuse the frequencies from the first cell because it's far enough away. This also means that the cell phone can be small and low powered, because it's normally close to a cell tower (and if not, too bad).

On Facebook, what determines the eight friends that are displayed in that 4x2 grid of profile pictures?

I've been wondering about this for a while, and there is evidence to suggest that it's a randomly ordered list of people you interact with or people who interact with you (possibly weighted by intensity of interaction as well as recency of interaction).Some evidence to support this notion:  - Facebook tracks who you look at or interact with via a ranking score (scary, but it helps make their search function more efficient for you): http://techcrunch.com/2011/08/17...If you want the applet to look at your own friend ranking, check out this site though I haven't tried it recently so I'm not sure if it still works (It doesn't work if you are using https): http://thekeesh.com/2011/08/who-...It would be interesting to see what actions change this score (something I've been meaning to test but haven't gotten around to)  - Based off this, there seems to be some sort of weighting system at play to make the list semi-persistent.  If you interact with a person heavily (sharing many photo tags, many wall posts, searching for them a lot, etc) these people tend to be on the list.  But if you haven't done these actions recently, someone new whom you've interacted with recently seems to appear in their place.    - Refreshing your page shuffles the list, but the same people seem to remain on this extended list (even if a friend has logged on more recently, for example) - the number of people shuffled is larger than the 8.    - Sometimes, people appear on my list that I haven't personally interacted with recently (ie: I haven't chatted, stalked, or otherwise paid attention to) or have shared too many interactions with in the past.  I suspect that Facebook takes into account whether they've been stalking you (and lists them to help play matchmaker and get you to talk to them).  Of course, I have no insider knowledge and would be interested to see what the official response is.  But I think it makes sense to list people who you care about (those you actively stalk) and people who care about you (those who stalk you) - after all, I assume one looks at his or her own Facebook page more frequently than any other given page, so it's a good way to entice us to interact with people.

What is the difference between current, watts, hertz, amperes and voltage?

OK. Well not in you order but :-Voltage is pressure or a force that can drive a flow of electrons given the chance.That flow of electrons is the current, measured in amps.Wattage is power. It is the amount of power an appliance or light bulb, anything’ uses.And is calculated by the voltage present across the lightbulb terminals and the current flowing through the bulb. If there are 12 volts across the bulb as would be if directly connected to a car battery and you measure the current through the bulb with an ammeter and find its 4 amp. the the wattage is 12 volts times 4 amps = 48 watts.Hertz is a measure of frequency. It is used in AC to show the rate of change. It was measured in Cycles per second but now is in Hertz but they are both the same.In the US there are 60 complete cycles per second and 50 in Europe.

I find myself always asking people to repeat themselves, then I realized what they said seconds later. Why is that?

I find myself always asking people to repeat themselves, then I realized what they said seconds later. Why is that?ADHD manifests itself in a number of different ways. I think it's possible that this is another one of those ways.As someone with ADHD, one of the challenges I face is "staying in the present." By that I mean, paying attention to what's happening at the exact moment that I'm experiencing it rather than letting my mind wander off to something else.I find that I still have problems with this. For example yesterday, I picked up my prescriptions from the pharmacy and the pharmacist asked for my ID. I handed her my debit card. I heard her and I knew what she had asked but my mind was somewhere else. It's easy to say to somebody with ADHD, "You just need to pay attention to what you're doing." But to somebody who has ADHD, that objective is a goal, not a reality.But now I have another problem. I played lead guitar in rock 'n' roll bands through high school and college and even a while full-time after college. My hearing has been damaged so that now I've noticed that I am turning into my father.I took care of my him for the last five years of his life and his hearing was very poor. If I asked him a question, I always knew what his answer would be, "What?"I try to be a little more polite about it. I say something like, “Would you please repeat that?" If I am with someone and have to say that more than twice, I will sometimes expand it to something like this, “My apologies. My hearing is not very good. Would you please repeat that?" I realize that it's a lot more words but it is significantly less blunt than, “What?”

How many joules of energy are required to run a 100 W light bulb for one day?

Energy= power* timePower=100WTime=24hrsTherefore, energy= 2400WhChanging this to kWh we get,2.4kWhNow, 1kWh =3.6*10^6 jouleSo, 2.4kWh= 2.4kWh* 3.6*10^6 joule=8.64*10^6 joule=8640000 jouleTherefore, 8640000 joules of energy is required to run a 100W light bulb for one day.