Fun Definition and 428 Threads

I was coming up with examples for my students as to why we demand they actually understand math in calculus class instead of plugging all their functions into their graphing calculators to draw graphs and calculate integrals. I basically hit the motherload... I have confirmed this works on...

Fun "remote viewing" experiment Hi guys! I'm happy to be back in the forums after so long :) So here's my story. I personally define "paranormal" as hypothetical "facts" on which we lack info for proving/disapproving/explaining. So I was looking around some "psychic forums" for fun. I'll spare...

Hopefully this question hasn't been asked here before, I did a search and it seems everyone else is asking much more practical questions. Anyway...The Situation: I'm modifying a Nerf gun (this one for anyone who's curious)...

In this video, the narrator explains why you aren't normally able to see the network of blood vessels in front of your eye, and a neat trick to actually see it. I thought it was really cool. http://www.youtube.com/watch?v=L_W-IXqoxHA&t=3m8s

Have fun with this website: http://sloganmaker.com/ For example, type in micromass and get: Things go better with micromass.

Circle Rolling around Rolling Circle (1) Circle 1 rolls around inside of the fixed base circle. Circle 2 rolls around inside of Circle 1.

You send a probe out into space at half light speed transmitting continuous video footage. What does the footage look like as seen on earth?

Hey guys, I got an idea in my head to have a bit of fun with a project idea. I want to make one of those claw games that they use to pick up toys, or chocolate bars etc. However there are so many ways to do it. Ideally i would like to make a small c program and put it on a PIC and use that...

Homework Statement I have two numbers: 509/729 and 511/729. I want to determine if they are in the Cantor set. The Attempt at a Solution I have: 509/729 in base 3 is: 0.200212 So this is not part of the cantor set because it can't be expanded in base 3 using only 0 and 2...

"Barrel of Fun" Carnival Ride, and the relationship between Friction and ω Homework Statement A ”Barrel of Fun” consists of a large vertical cylinder that spins about its axis fast enough so that any person inside will be held against the wall. Assume: At an angular speed ω1, an upward...

Homework Statement Boundaries at x=0,a y=0,b This is a waveguide. w = angular frequency and k is the wavenumber. Have the seperable solution to the wave equation. \psi = X(x)Y(y)e^{i(kz-wt)} Where w=c\sqrt{k^{2}+\pi^{2}\left(\frac{n^{2}}{a^{2}}+\frac{m^{2}}{a^{2}}\right)} I just...

I was wondering if someone could help me see where I am messing this up: Lets say we have our train with a relative velocity of .5c, Also suppose it is .816ls tall, and that there is a mirror mounted on the floor, another mirror directly above it, and a third mirror about .577m to the rear and...

“As per Inspector Lestrade, the accused house is on the bank of a river which is quarter mile wide and has current of 2 mph“. said Dr. Watson “Don’t forget Watson, Just opposite his house, on the other bank, is the victims house. The accused has only to swim across!” Sherlock Holmes...

Does anyone have any suggestions on what difference between Wandarama and Fun Fly Stick? which is a toy to generate electrostatic energy. Wandarama is much cheaper than Fun Fly Stick, any difference in function...

Greetings, I have shifted much of the focus of my research from thin film specifics to the plasma chamber we are using, as I was unfamiliar with the intricacies of plasma and found that a lot of the parameters we are counting on frankly could not be counted upon. I'm still green, but it's...

Neglecting air resistance and the weight of the propellant, determine the work done in propelling a 13-ton satellite to a height of 300miles above Earth and 550miles above earth. Assume Earth has a radius of 4000miles. Can someone please show me how to do this?

Hey all, I'm looking for a short and fun mini design build competition for a university ASME meeting coming up. I think everyone has been a part of something like this before. For example, I did an egg drop once. We were given about 30 mins, tape, and bendy straws and had to come up with an egg...

I am getting fat. Since I graduated college, I don't know what to do and I don't really know anyone to work out with. Here's the thing: I can't run or do elliptical machines. I just get so bored and I can never commit to it. I love racquetball, but I don't have anyone to play with. Can...

Homework Statement The metal rod in the figure moves with speed v parallel to a straight wire that is carrying current I. The distance between the two wires is d, as shown in the figure. If the end of the rod closest to the wire is chosen to be at zero potential, what is the potential at...

I've got to teach a class of 10th graders math tomorrow. I was thinking of showing some fun things in math like puzzles, understandable open problems in math,etc. Can anyone suggest me some fun stuff in math that would captivate 10th graders?

A short question. How to make learning a fun experience? I'm sure a lot of teachers deal with this problem in school or wherever...

***Fun Challenge -- weighted average of global rankings*** Goal The goal is to create a weighted average of global rankings. Does not have to be perfectly accurate (if that was even possible). Specific Example To make this problem less abstract and easier, we are going to use a specific...

Lets play chess!

"Fun" Magnetic Scalar Potential Problem Homework Statement An infinite cylindrical shell of radius b is placed inside a constant field B which points along the upwards z-axis. A second cylindrical shell of radius a<b is placed inside the first cylindrical shell, and the volume from b>r>a...

Hello. Currently I live in Canada but I want to move to Europe. My family lives in Netherlands and it is really a beautiful country. Would it be fun to live there? How different is it from Canada?

We use user-names to reflect on our personality but because we sometimes become very cryptic or because we use different language not all people will interpret it as we like it. Lets just speak out how we feel about the popular usernames- To begin with, the first thought that came to me after...

So I just bought a digital multimeter, plugged it into a trailer outlet and that's been about it. When I get off work in the coming weeks I'll use it on my car. So I ask, are there any fun things to do with a multimeter?

OK, it wasn't all that fun. A few days ago, my kitchen light fixture over the sink started acting up - not working or working only intermittently. The box over the sink contains a two-up receptacle and a switch. I figured that the switch was toast, so I prepared to wire in a new one. Imagine...

Homework Statement Looking at the characteristic equation for a SR flip flop we have Q+ = QR¬ + S It's known (from the associated K-map of the SR/SC flippy floppy) that (Q+)¬ = Q¬S¬ + R K-maps are useful as they do the simplification for use, but I'm trying to use algebra to get from Q+ to...

Hi everyone I am a second year engeneering student and i have a report to do where we have to work out the damping coeficient of a dashpot. This involved using the equivivilent system and displacement time graphs at two different points on the beam. I was wondering after converting the...

Hey guys, my friend recently scored a great football goal and it was posted on youtube. I'm mechanical engineering uni student and i wanted to test my physics invoving projectile motion to calculate the Initial velocity of the ball. After some calculations i came across a startling answer of...

Homework Statement Find the point closest to the origin on the line of intersection of the planes y + 2z = 12 and x + y = 6Homework Equations \nuf = \lambda\nug1 +\mu\nug2 f = x2+y2+z2 g1: y + 2z = 12 g2: x + y = 6 There are supposed to be gradients on all of those, whether or not LaTeX...

So finally ima start my true electronics studies at school i finish my calcs, my physics and all the prerequisites to get into the EE program.. So i have play with arduino from turning on an LED on to building a small robot. Also i done a bit of straight AVR but not much, so my C programming is...

Homework Statement A 1.71 kg package is released on a 54.1 deg incline, 4.00m from a long spring with force constant 141 N/m that is attached at the bottom of the incline . The coefficients of friction between the package and the incline are 0.39 and 0.24. The mass of the spring is...

Five pirates are trying to split up 1000 gold pieces. The rules are as follows: Pirate #5 must divide the gold up in such a way that a majority of the pirates (including himself) agree to. If he does not get a majority vote, he will be killed, and pirate #4 will get to propose a solution to the...

I'm not using the suggested formatting because my question doesn't fit it. If this belongs elsewhere, I apologize for posting it here. I am currently in Calc II and we are starting to prove certain things. I found out that I really enjoy this and want to do a few proofs a week just for fun...

Hi, I was wondering this question: Why does U=mgh and U=Gm1m/R come out to similar values even when their equations are completely different? Thanks

I was watching a documentary a couple nights ago, and it caused me to start doing random calculations. Granted the information is easily accessible online, but what is the fun in that. Here is the problem Given light takes 8 minutes to reach the Earth from the sun, at what speed is the...

fun with baseball and cannon sim. please help? hey all, I was just curious about a few questions. ok assuming a baseball weighs 5 ounces (and has a mass of .142kg) how many Newtons of force would it take to shoot the baseball 500meters at a 45degree angle assuming the target was level with...

Help me develop a public-key system (for fun) :) I just read up on public-key encryption and now I'm kind of interested in building an algorithm of my own. How about something like this: 1) Alice could type her message to Bob into a computer 2) The computer converts the letters and...

I know this has been done on a larger scale but I was thinking of playing around with something simpler. My idea was to try to build a simple little robot that follows the point of a laser. It doesn't have to be elaborate: even if it just follows the laser around a few inches in front of it...

First off, I may or may not know the correct answer to this one... Here it is.. I have a set of say 100 small perminent magnets which are randomly oriented in space. I also have an empty burlap sack. I grab each of the magnets one at a time and throw each one into the bag until all...

Fun Game Theory, Guessing a Number With a "Twist" You and I are playing a game. I begin by picking an integer from 1 to 2011 (inclusive). On each turn you try to guess my number. I then tells you whether your guess is too high, too low, or correct. If your guess is not correct, I add or...

Alright people...come up with a fix in algebraic form, using $ for money, I for intelligence and whatever other variable. Make it interesting :) haha

So I'm taking a course on game theory and as an intro he left us with this question. I'd like to have it solved fornext class as it is for bonus marks.I'm not sure how to add an attachment here so I will describe the game and board and hopefully someone can tell me how to upload a photo in the...

Someone try to solve this, and don't cheat and use a TI89 or similar CAS, a scientific calculator and a pen and paper. http://img682.imageshack.us/img682/9306/mathnm.jpg

This question pertains to the (non)relationship between thermal conductivity, specific heat, human perception and thermosensors. Here goes: Let's say I place four thermosensors on my body. Then, on top of these thermosensors I place four different items (A, B, C, and D). All four items start...

I just finished my 2nd year doing physics at university and the courses have really driven the fun out of it. Just learning equations and procedures, as a result my performance has slipped. It's the first day of summer and I want get back into Physics. I read the how many hours to study...

FUN solving Quadratic equations :) Homework Statement Marnie can walk 1km/h faster than Jon. She completes a 20 km hike 1 hour before him. Write an equation ans solve it and find their walking speeds. Homework Equations speed= distance/time the quadratic equation The Attempt at a...

Homework Statement Given integers 4, 8, 7, 5. An inversion occurs when one integer is larger than an integer that follows it; thus, in the above arrangement there are two inversions due to 8 and one due to 7 or three inversions in all. There are twenty distinct possible integers arranged in...