Type Definition and 912 Threads

As far as I understand type systems in strongly typed system such as the one found in Java you must specify the exact type of the variable. Like e.g. int x = 5; // strongly typed also this would fail Object x = 5; Object y = "Not soo strong are we?"; Object z = x + y; // would throw a...

Temperature can't get lower than absolute zero, so is there some point in which it can't get higher?

What type of a magnet is really strong, not too big, durable, and has a long life? Where do I get it?

Many university organic course laboratories use Liebig columns packed with glass beads. This is what I use, but I would like to know if there are better columns that can be used instead of this. I had a problem with this type of apparatuse before. The glass beads shot right through the $30...

Hi there I was just wondering how to type Optimatiozion of a Parametric equation, in LaTeX?

okay i know how do do type one and type 3 projectiles but there is this certain kind of type 2 that i can't figure out. if the problem gives me a initial velocity and an angle of 30 degrees i am okay. BUT for this kind i don't know what to do: "A gymnast becomes a projectile by doing a flip...

My friends are having an argument as to whether parallax error is systematic or random error. We have tried looking all around in books/internet etc but nothing mentions what type of error it is. Any help would be appreciated :)

Hello. I have an assignment that asks me to create a program that asks a customer of a store to type in their name, and an amount of money they spent. Then the program calculates a dicount they get according to the amount of money they spend. And print the discount to the screen. But it...

I'm just curious about what type of sciences I would need to be an archaeologist. I love history/english which are my strong points academically and I'm not really a fan of the sciences/maths but I am still curious what I might need.

I just started physics this year, and we were assigned our first problem today. Before I continue I'd just like to stress that I am not looking for an answer. Just a hint, or something to help me out. Telling me that I'm on the right path would be helpful as well :smile: Here's the...

In earlier versions of Windows, all one had to do to change a file type is simply rename the extension. How, though, does one change a file's type in Windows XP? For example, I have some downloaded video files that are listed as "htm" files. When opening them in Windows Media Player, I get a...

Let g(n) = 2g(n-1) + g(n-2), g(0)=0, g(1)=1. The explicit formula is g(n) = ((1+t)^n - (1-t)^n) / (2t), where t is sqrt(2). Let h(n) = the sum of the first n+1 terms of g, ie h(n) = g(0)+g(1)+...+g(n). Then a possible recursive definition of h(n) will be similar to that of g(n), except that...

Suppose you have n elements with integer keys and they are to be put into a heap. What would be the time for creating a heap by repeated insertion into into an initially empty heap? Say, for instance if we are using binary, binomial and fibonacci heap type. Any suggestions?

Does the Java API have any way of automatically buffering Collections, so that it stores only a certain amount in memory and stuff that was not recently used goes to the hard drive if there is a lot in memory?

hi if anyone can help me solve this problem (T- type low pass filter)it will be appreciated. i have managed to find the current in the capacitor and form there on i don know what to do. thanks circuit of a resistive load is fed from a rectifier, via a filter. The filter is designed to...

Nowadays, the most common computer games need u to use ur hands and fingers (i.e. keyboard and mouse). Or another type of gaming, VR which is less common. But is there any development of gaming taht just use ur brain thinking power to play?

Just a small list, mark up any others I have neglected... :cool: edit: already see, I should've put in PDEs with delay...

Here is an interesting [and important] paper, IMO: The Hubble Constant: A Summary of the HST Program for the Luminosity Calibration of Type Ia Supernovae by Means of Cepheids Authors: A. Sandage (1), G.A. Tammann (2), A. Saha (3), B. Reindl (2), F.D. Macchetto (4), N. Panagia (4)...

I know that CT Scans provide still images of various parts of the whole human body. I also know that Ultrasound provides live images and movements of fetuses. Is there a machine/scanner that scans the body and provides real-time video of the organs in operation, including blood-flowing, heart...

Hi. What I'm looking for is some sort of sealant that will be completely airtight. A liquid. The idea is to be able to cut a potato in half and completely cover it in some sort of sealant so that it stays that way for a very very long time. I know artists use a type of sealant to keep...

Directions: Find all the values of x such that the given series would converge. http://cwcsrv11.cwc.psu.edu/webwork2_files/tmp/equations/fd/74dc1166ac21d3f59ee568a71eb55a1.png Here is my work: http://img203.imageshack.us/img203/9559/lastscan3jv.jpg I got it wrong but is it because i...

Hey everyone i was just wondering, for future reference, which type of fan generally yields the greatest output velocity/volumetric flowrate and a relatively low pressure drop (ie like +/- 10kpa sort of thing), assuming axial speed is the same for each of the general types of fans. This would be...

Hopefully, this caught the attention of VanEsch.. :biggrin: Let's say Bob and Alice do an EPR type of experiment. A gazillion entangled pair of photons is sent to Bob and Alice who are 1000 light years apart. They measure the spin of the photons. They do not know yet that this violates...

i was searching for the exact specifics of a type III civilization when i came across this serious news artical http://www.indiadaily.com/editorial/6598.asp" Its about a great explosion which happened approximately 50,000 light-years away On Dec 27 2004. I do recommend reading it...

Category XI - The Quidnunc Though you don't fit in, and your social graces are sometimes lacking, people like you because you have all the information. http://quizilla.com/users/ProlixFootle/quizzes/What%20Type%20of%20Social%20Entity%20are%20You%3F/

Torque on a "see-saw" type object I had this question on my Physics test last week. I missed it, and it's now time to do test corrections. I have read through the section once again, but I keep on getting the same answer. A uniform plank XY is supported by two equal 120-N forces at X and Y...

(Damn it! I just broke my only good keyboard with an arch, the "N" key is broken somehow. So I can probably only do 110 or so now. The proper arch is VERY important) If I can figure out how to print the screen I will How fast can you type on a standard, QWERTY keyboard? Dear Kevin ...

I'm sure one could find a reason to use any data type. There is a lot you can do with just intergers. I do, however, have a computational physics book and they make wide use of the type double. Could float be used as an alternative?

Hi all! Just registered for this forum, wish I had gone looking for help earlier this semester, this would have been nice. My physics final is tomorrow, and I've been trying to finish up the practice final (I have my calculus 3 final and several other assignments also due tomorrow), but I...

Does anyone know an especially good book/textbook on quantum mechanics that is written for an audience with first year physics knowledge? I will be donig 2nd year QM next year so a book that describes QM well but obviously not a thorough treatment. Thanks

What kind of job can a "insert type of degree here" get? We seem to get a lot of questions of this nature on PF, so I thought I would compile a list of the appropriate professional organizations since these are a great source of information on the fields that different university majors can...

I would appreciate any help I could get with this problem... A spherical-shaped hollow steel shell, with a radius of 2.5m, containing some instruments, is lowered by a cable into a lake. The shell with its contents weighs 7.2 x 10 to the 5th N on the deck of a ship from which it is being...

When I type in "google.com" When I type in "google.com" into over yonder address bar, it redirects to google.com/ig! Is this because I am signed into Gmail, or because google is pushing their homepage thing now?

I have to answer a homework problem due today that I am not sure how to do the problem reads. "Write a program that calls a void type function to find the maximum of three given integer numbers" We use visual basic studio, any help would be appreciated.

A body moving with velocity V enounters a resistance in the form of dV/dT=-k*V^(3/2). Show that V(t)=(4v.)/(k*t*sqrt(v.)+2)^2 v. is the same as v(subscript 0) When i solve the differential equation i keep getting V(t)=4/(k*t-v')^2 I have no idea how to get from dv/dt to the given v(t)

1) a) If A = 1 2 0 3 and B is an upper-triangular matrix such that tr(B) = 0 and AB = 1 -1 0 -3 then B = _____ AND b) If A = 1 5 -1 3 and A = B+C where B is symmetric and C is skew-symmetric, then B = ___ and C = ____. 2) a) If A, B and C are matrices such that...

A boy of mass 41 kg rides on a playground merry-go-round at a speed of 2.0 m/s. and has to hold on with a force of 79 N to keep from flying off. What is the radius of the merry-go-round?

What is a "closure type"? I first encountered it by looking at the source of the uBLAS package from boost.org -- it's essentially an implementation of the BLAS using expression templates. I noticed that a lot of the classes have a nested typedef called "closure_type" (and a...

Take the test now: http://www.blogthings.com/amenglishdialecttest/ Here are my results: 80% General American English 15% Yankee 5% Dixie 0% Midwestern 0% Upper Midwestern

i use mathType to type mathematical formulae, after that, what should i do to post the formulae to this forum? Thanks in advanced! :biggrin: :bugeye: :approve:

second type perpetual motion machine is existent . miaobo Let us assume that a system make a circulate of thermodynamics ,if we can approve that entropy will not equal to 0 , so the second law of thermodynamics is wrong ,and the second type perpetual motion machine is existent . The...

Can somebody name every type of STD because I wanted to get tested for all of them just in case I had any. I guess STDs are different from other diseases because they're only transmitted during sex or something? If people are going to get tested for HIV/Aids they need to be tested twice for...

I need to solve the equations of type ax+ay-xy=c (or) a(x+y)-xy=c In this equation a & c are known.Whether is it possible to find x & y values using a deterministic method other than trial & error method ex 127x+127y-xy=12732...

For a BH to form it must have a mass boundary, but does this boundary vary with differing types of matter?

I have a question about what computer to use for engineering. You see I don't want to use a Windows box and would greatly perfer to use non-redmond software. so..If you are very anti-windows, what makes sense? can you use a mac? is that good for engineering school? A Linux machine? what...

Another microsoft first! Type =rand(99,99)[Enter] into your MS word document into the beginning of the line and see what happens.

Help me! Can anybody tell me how to type mathematics terms, such as integration? Can anybody tell me that where I can download mathematics solfware so that I can type mathematics text?

I've posted on Homeworks one of the number I did not understand. However, I would like to know the steps to calculate an improper integral of type 2. The type 2 is the one from constant a to constat b, not the one with inifnite. Please tell me the steps the accomplish it. :smile: I know...

I don't understand my Math Homework, here's the number that I don't get. [int a=1 b=3] 1/(sqrt[abs(x-2)]) dx sqrt = square root abs = absolute value Integral from 1 to 3 Can anyone explain this to me clearly, I'll really appreciate :smile: Thanks

1.) Take the limit as x approaches infinite... Square root of 4x^2 + 1 / 2x-3 umm so i really don't know where to start this..i was going to multiply the numerator and denomenator by 1/x, but i don't know what the numerator would be then.. and for number 2.) Take teh limit as x...