Conversation Definition and 55 Threads

Hi, I was checking my private messages under "Conversations" but was only able to see one conversation. I'm sure that I had more messages there. Are the private messages/conversations get deleted after some time? Thanks!

Wasn't sure where to drop this thread, so here it is! I've searched the internet and this forum, perhaps I don't have the correct keywords, but I haven't been able to find anything that discusses this topic. I'm interested to know about your individual experience of learning. I'd like to think...

Can we omit some words in conversation? And when and what words we can omit?

Is there any average time between responses in a simple conversation using speech (not text)? For example Bob : Hello 1sec gap Mike : Hey!

Hello, Having bought now my Arduino UNO I can't help but notice how many other open-source and similar boards there are (RaspberryPi, CIRCUIT Computer...). My friend has a RaspberryPi 2 and sometimes talks to me about it. I can't help but wonder what is the difference between all these such...

Consider a 4 current J^\mu and a metric g then conservation laws will require \del_\mu J^\mu = 0 my lecturer gave me a brief problem and I think I'm missing some understanding of it he writes What I'm not understanding is, where he states, if we choose B to be the time slice between etc...

How do I add a person to a conversation on this site?

A new experimental result from BESIII finds that there is isospin violation in the decays of J/Psi mesons in a path involving scalar mesons (with a narrow width in tension with world averages) and notes that a previous experiment found isospin violation in another decay chain...

How come when I do a conservation of energy up an incline the displacement is the distance up the incline, but when I do a conservation of energy from a projectile the displacement is not the resultant of the x and y displacements (instead, it's only the displacement in the y-direction)? Thank-you

Homework Statement Hello, first year engineering student here :)https://fbcdn-sphotos-h-a.akamaihd.net/hphotos-ak-xpf1/v/t35.0-12/10744040_871781156179440_107104578_o.jpg?oh=73c4261941e7ef6b7c682558c0925a63&oe=544F5CA4&__gda__=1414428985_0415c28b8b2e194bf0b57f065267fe49 [/B] The question is...

Why aren't force fields such as magnetic, electric and gravitational fields considered as a violation to law of conversation of energy?? :confused:

For my question let us just consider two telephone (POTS) connected by wire, junction boxes, several telephone switches/exchanges etc without any wireless connection. One telephone is in continent A and other is in continent B. I understand how sound is converted into electric current by a...

Homework Statement A ball (considered as a point) of mass m = 1.5kg is launched from a spring with a Δx= 5cm. Find the elastic constant K knowing that the ball is forced to travel the path ABC and that at point C its speed is zero. AB has no friction while BC has a friction μk=0.05. At point C...

Homework Statement a cannon is fired out of a cannon at a velocity of 28m/s and at an angle of 90°. Straight up. Assume it starts at a height of 0, figure out the max height it will reach. Air resistance is ignored. Homework Equations The Attempt at a Solution I'm not 100% on this but...

[SIZE="4"]Homework Statement [From Serway College Physics; Ch 8, problem 52] Use conversation of energy to determine the angular speed of the spool shown in the figure after the 3.00 kg bucket has fallen 4.00 m, starting from rest. The light string attached to the bucket is wrapped around the...

Jameson, 1. I thought that because what I have integrated is essentially an area that it should be written as squared units (since the unit of measurement isn't otherwise stipulated) 2. thanks for the tip regarding mixed fractions; duly noted! "Using Tactic D-15 ..." You encapsulate my...

I have been having a conversation via email with someone who adamantly agrees with the statements of geocentricism. My first few comments were crap, but after that it got better. What do you think about his statements back? Sorry that this is so long, feel free to skim. My statements are...

Hello Forum, it can happen that in a VoIP conversation we hear some echo, i.e. we hear our voice, with a certain delay... We speak and the signal goes to the receiving party. Why would a copy of our voice signal make a round trip and come back to us? What causes that "reflection" of the...

1. The Question from Text: "A forest playground has a tyre hanging from a tree branch. The tyre behaves like a pendulum, with a rope of 4.0 metres length, and the tyres mass 15 kg. A child of mass 45 kg swings on the tyre by pulling it 3.0 metres to one side and leaping on. What is the maximum...

I attached the problem and the solution. The book uses V has potential energy and T as KE. I'm not quite sure how they did this problem. I was following it until the 2nd to last line of equations. where they have "8.829-11.772+1/2*6*v^2+0=0" Why don't they have the KE for the 4kg...

Homework Statement I already solved Part A so just ignore that. Basically part B is saying that the ramp is no longer frictionless and has a kinetic coefficient of friction of 0.30. The other surfaces are still frictionless. It wants me to figure out how much work is done ON the block by...

Homework Statement Leonard wants to know how fast he can throw a ball, so he hangs a 2.3 kg target on a rope from a tree. He picks up a 0.5 kg ball of clay and throws it horizontally against the target. The clay sticks to the target and the clay and the target swing up to a height of 1.5m...

I noticed that once I was talking to a friend close to me and then a vehicle passed by with a huge sound and then I merely heard what he said. Can someone explain me why ? even though that friend was close to me ? Does it have any connection with the Doppler effect ?

Running an electric current through a copper wire induces a magnetic field. Wrapping that wire around a ferromagnetic material amplifies its magnetic field (this is the basis on which electromagnets are designed*). This does not violate Newton's first law of thermodynamics because magnetic...

Party goers, barflies, class reunionists, students, friends, coworkers, family and whomever you have attempted explaining physics to. Big bang, black holes, quantum mechanics, superstrings/branes, stereo, cars, astronomy, Einstein, Newton etc. Do you find them more receptive to physics...

Does anyone have any suggestions about how to engage someone in a conversation about defensive behaviour? How do you talk to them about it? Here are a couple of small examples, but not the totality of what I’m dealing with: I say – I have red hair; Kelly has brown hair. They say – Well...

Conversation of Momentum (2 problems) Homework Statement The problem: "A 20.0 gram bullet is fired into a 2.50 kg wooden block initially at rest on a horizontal surface. After impact the block slides 2.50 m before coming to a rest. If the coefficient of kinetic friction between the block...

I found this today and decided to mess with it. My conversation is below but, I'm sure that others could do much better. http://www.cleverbot.com/" User: Physics. Cleverbot: Physics? User: Yes. Cleverbot: What about math? User: Physics. Cleverbot: I love physics. User: That's...

A body is tied to a wire that go through a hole in a (frictionless) table on which the body is spinning. The body is spinning while the wire is pulled from beneath the table. according to conversation of angular momentum the speed of the body should now increase, but in terms of forces...

Homework Statement A 700 g block is released from rest at height h(not) above a vertical spring with spring constant k= 400 N/m and negligible mass. The block sticks to the spring and momentarily stops after compressing the spring 19.0 cm. How much work is done (a) by the block on the spring...

Homework Statement At a construction site, a 65 kg bucket of concrete hangs from a light (but strong) cable that passes over a light friction-free pulley and is connected to an 80.0 kg box on a horizontal roof. The cable pulls horizontally on the box, and a 50.0 kg bag of gravel rests on top of...

Alright, According to the law of Conversation of Energy states that, Energy in a system may take on various forms (e.g. kinetic, potential, heat, light). The law of conservation of energy states that energy may neither be created nor destroyed. Therefore the sum of all the energies in the system...

Nothing particularly earth-shattering on this Nixon tape, at least not compared to other ones. But it gives you an interesting glimpse at how two very powerful men see themselves in relation to the world around them. In particular, you get to learn how they divide the world up into good people...

I hope this is where this goes.. Does anyone believe in time travelling.. Also I hope this is considered a physics question...LOL:cool:

According to Noether Theorem, Every symmetry corresponds to a conversation Law in the nature. For example: If rotational symmetry exits, Angular momentum is conserved. How can I be sure that which symmetry corresponds to which conversation Law? Can you tell me the conversation Laws under...

Homework Statement 2 objects are connected by a light string passing over a light frictionless pulley. The 5kg object is released from rest. Using the principle of conservation of energy, (a) determine the speed of the 3kg object just as the 5kg object hits the ground The picture shows...

Homework Statement a projectile of mass M explodes into three fragments while in flight at velocity v. one fragment of mass M/2 travels in the original direction, one of mass 3M/10 comes to rest and the third fragment of mass M/5 travels in the opposite direction. The energy released in the...

Homework Statement Suppose that the sound level of a conversation between two men is initially at an angry 70 dB before dropping to a soothing 50 dB. (a) Assuming that the frequency of the sound is 500 Hz, determine the initial and final sound intensities. (b) What are the initial and...

Noisy Jackhammer man...has special headphones so he can hear you, you cannot hear him [FONT="Comic Sans MS"][SIZE="2"]My physics teacher wants us to answer this "A special device can transmit out-of-phase sound from a noisy jackhammer to earphones worn by its operator. Over the noise of the...

I want to talk to my husband about math. How can I trick him into learning calculus?

I know there is already a post on this, but I just wanted to make a point. I live in California, so obviously there is a great deal of controversy here by the coast and especially where I am (a small conservative community) whether or not warming is legit (long story short, I believe...)...

http://bloggingheads.tv/video.php?id=236&cid=1245 this has a (to me) really interesting conversation between two science journalists or science writers with special interest in physics the reason it is interesting to me, is that one half of it is George Johnson, and he is IMHO the most or one...

energy is conserved, no slipping or air resistance or anything. There is a pulley, on one side is a mass resting on the ground, and on the other side is a larger mass above the ground. If the larger mass is released, what is it's speed when it hits. okay, here is what I have: PgM =...

[FONT="Courier New"]A 2 kg copper block, initially at 100°C, is brought in contact with a 2 kg plastic block, initially at 20°C. They are kept in contact long enough to reach the same equilibrium temperature. The specific heat of plastic is four times as much as the specific heat of copper...

can anybody please explain these two definations? i know momentum is the mass in motion..but how do we use the formula...explain please thx

There was an interesting conversation at Distler's blog between the owner and fh. I thought really thought-provoking points were raised. I would like to copy some sample exerpts here. the main address for Prof Distler's blog is: http://golem.ph.utexas.edu/~distler/blog/ This particular thread...

Kids are hilarious, especially when they are eager to offer advice to complete strangers. This conversation took place in a Laundromat yesterday between a six-year-old girl and myself. Me: (pulling old sweater from the dryer, noticing the thread pills that have formed) Girl: If you have...

Max Tegmark, Lee Smolin--polite conversation at Peter's interesting exchanges at Woit's blog http://www.math.columbia.edu/~woit/wordpress/?p=310#comments raising an important issue with the recent Tegmark et al, and Wilczek, papers. links to those papers are here...

http://globetrotter.berkeley.edu/people4/Ekman/ekman-con0.html A nice, wide-ranging interview with psychologist Paul Ekman, who's done ground breaking research on facial expressions and emotions. The interview was conducted on camera and you can watch it from the website (~1 hour), or you can...

Could somebody post a realistic conversation between a mother and a daughter? I'm supposed to analyze one for psychology Thanks