Counter Definition and 213 Threads

I watched an interesting video on YouTube by veratisirm where he had a meter long metal rod with a huge metal fly wheel on the end of it. Long story short he could barely lift the thing but under full spin he could just about swing the thing like a sword. the only thing was the precession wanted...

Many of the people in humanities I encounter seem very wedded to mindset I refer to as "construct = everything". For example, they say bazar things such as gender is 100% a construct. They say this as if sexual selection doesn't exist (to be fair, they honestly don't seem to know it exists)...

Hi guys. I have a problem with my spectrum and I would like your help. I have a system with a proportional Gas detector (krypton gas), preamplifier and amplifier, Co57 source, and the last two months the spectrum has gotten worst as you can see in the attachment. Does anyone know what might be...

Homework Statement Process water with a specific heat capacity of 4.182 kJ kg–1 K–1 flows at a rate of 0.050 kg s–1 through a heat exchanger where its temperature is increased from 16°C to 85°C. Heat is supplied by exhaust gases (mean specific heat capacity 1.075 kJ kg–1 K–1) which enter the...

Einsteins special theory of relativity states that time passes differently for different observers. Basically the faster you travel the slower you aged. So I assumed this means to aged the fastest, you don't move. We also know Earth is moving around the sun. The solar system is moving upward...

Hi , Can anyone please give me an idea to disprove the following with counter example: A , B & C be sets. If A X C = B X C , the A = B . I tried giving random numbers in venn diagram but didn't work. And, using subset way to prove equal but still couldn't solve it.

I have been looking for an answer about what a Geiger counter actually measures. I am puzzled by the claim that it can actually give measures in sieverts/hour, i.e, measure the dose equivalent received by the body. On Wikipedia (Geiger counter article), I read: "a G-M tube can detect the...

Alright if I have an object that's completely constituted of alpha radiation particles (emitting the +2 charge nucleus of a hydrogen atom), how would that be accurately detected taking into consideration that I don't have a Griegor Counter on hand? Americium-241

Homework Statement Detection of radiation by a Geiger-Muller counter depends on what? a. the emission of a photon from an excited atom b. the ability of an ionized gas to carry an electrical charge c. the detection of the sound made by decay particles d. the ability of a...

I collect branded goods and came across this old Energiser battery which had been left at one of those communal recycle collection points in our local supermarket, what a find, it's the old ones that I remember from my childhood and labelled as "Made in Britain" (my God, that must have been some...

Hello, I have a real world application that I need some help with. I am sensitive to the fact that this is not the space for homework questions, or homework style questions. I feel that this is neither. If you disagree, please let me know and I will post it elsewhere. It has been a while...

Homework Statement Hello, I need to create a digital counter that follows this sequence: [FONT="Courier New"] 00, 10, 01, 11, 01, 00, 11, 10 A , C, B, D, B, A, D, C Homework Equations N/A The Attempt at a Solution There are four states (A = 00, B = 01, C = 10, D = 11) so I...

1. Homework Statement An average value of N measurements is defined as: ravg = 1N ∑ ri where i = 1 and it sums up to N measurements By using this expression in the master formula for a general function z = (x1, x2,...) error propagation, we find the δravg error propagation: (δravg)2 =...

Homework Statement A geiger counter measures 750 counts in 5 min a) determine the average counting rate and the standard deviation of the counting rate. b) find the relative error c) How long would you want to count to get a relative error of 1%? Homework Equations standard...

Greetings, While attempting to learn something about cryptography, I have repeatedly encountered a commonly quoted argument about the minimum energy required to cycle a 256 bit counter through all its states. It says that the absolute minimum energy required to change the state of a bit is...

I have a statement that looks like : vD.vD.vD.vD Where vD is noncommutative (but that doesn't really matter) I want to replace it so that each vD becomes v[a].D[a] But I would like it so the "a" is not repeating. So I need somehow a function that each time it is run returns it with...

I'm trying to get the hang of labview and it's going pretty well so far. My plan is to control a SR400 photon counter and I seem to get it to do stuff on my commands even though there's no manual for the drivers. (does anyone have one? :) ) My problem/question: I can get the counts for each...

When an ac generator produces high current the counter torque increases, but if voltage increases would the counter torque decrease? Is counter torque related to counter EMF?

Hi all, I need serious help here. I have to build two types of circuits as shown in the attached. The second one shows the circuit when the comparator's output is returned to the CLP. The IC's used here are IC 85 and IC 393 and the prototyping board used here is NI ELVIS 2. I think I have...

One thing is not clear to me. When alpha or beta or gamma radiation enter into geiger counter, it ionizes the gas and ionization current produces counts in the detector. What exactly this counts indicate? Does it show the number of alpha or beta particles enter into the tube? Since even if one...

Problem Statement . I am trying to create a 12 bit counter with a combination of 4 bit counters (74191 Spec Sheet: http://pdf1.alldatasheet.com/datasheet-pdf/view/7831/NSC/74191.html) I cannot figure this out for he life of me. I'm honestly not understanding many of the circuits we have...

I am in a lab class and we are currently measuring count rates for a specific source. Yesterday we ran a program that runs 3 second gate times on a CS-147 source with a voltage of 500v running through the detector, and a threshold of .5v on the counter. This 3 second gate time was to be repeated...

Hey all, Wanting to create an up/down counter that uses a photogate as a trigger, and a 12 segment LED bar graph to display the count. It will need to begin at full illumination, turning off one at a time on activation of the photogate. Will also need a reset switch, though I'm thinking a...

Homework Statement Create the design for a sequential circuit that counts 0-5 using only D flip-flops. Your designs should include a state diagram, state table, stated equations, and input equations. Additionally, draw the circuit diagram that represents your 0-5 counter. Your design...

Homework Statement For the counter shown below, determine the main cycle, and for each of the unused states, show what happens if it starts up there. http://i45.tinypic.com/33l1lhc.jpg Relevant equations N/AThe attempt at a solution Based on the diagram in the link I provided, I know that...

I'm not sure this is the correct section, but I have a problem. I'm a physics undergrad self-studying analysis from baby rudin, finishing Chaper 2. I seem to be able to work all the exercises and sometimes find other proofs to given theorems, but I have a problem in finding counter-examples in...

Homework Statement I'm trying to show that f(x,y)=x\sqrt{1+y^2}+y\sqrt{1+x^2} is associative, or provide a counter example. (All variables are real numbers.)Homework Equations The Attempt at a Solution I have it down to needing to show that...

Hello Guys, I am trying to do a simple digital electronics project where I put two seven segment displays and once I connect the voltage source, the displays start counting automatically from 00 to 99. Here is a video of exactly what I want to do: My group and I found the attached...

Homework Statement http://puu.sh/2qUr7 Homework Equations The Attempt at a Solution http://puu.sh/2qUwc I know that Q0 goes toggles 1/0 every rising edge. And Q1 toggles 1/0 every rising edge of Q0. And Q2 toggles 1/0 every rising edge of Q1. But I don't understand how the...

Okay so, when a motor spins in an external magnetic field there will be a change in the magnetic flux threading... When this magnetic flux threading is changed there will also be an induced current that is produced but why is this induced current in the opposite direction of the current that is...

Hi! I just finished building a 555 chip based monostable multivibrator with a output time of about 5 seconds after reception of the trigger. Can I couple a 4017 decade counter IC to the output pin of the 555 so that I can use it to operate different devices one after the other depending on...

I needed to make a ripple counter start from 3 and end at 17. I got it to reset to 0 when it reaches 17, but I can't get it to start from 3. I am using 5 JK latches with LEDS attached to the outputs of each to represent each number. To get it to stop at 17, I nanded the msb and lsb and...

So as an aside during class my ECE lab TA mentioned that you could make an up/down counter using nothing but JK flip flops, we've already done an up/down counter using JKs, AND gates, and OR gates, and I understand how you could make an up counter by taking the Q prime from one flip flop and...

Demonstrate with the help of a counter-example why the following is not a vector space. 1. A= ((x,y) \ni R^{2}/ x\geq0) I have many more questions like this, but since I cannot get the first one I think I might have a chance if I understand it. As far as an attempt at an answer, I can...

hey, so let's say i have an electric fan with something like 2, 1/4 in. blades, 60 rpm, and 10 cm diameter and i want to attach it to an object and turn it on so it would fly (like a quadrotor) before i try, i want to know if it is possible by knowing how much counter force can it make on the...

Hi I got this question on midterm. the correct answer is 20 MHz. But I am getting 10 MHz. I attached a text file which shows all the work I done. Can someone please explain this question and tell me where I am doing it wrong. Thanks

Hi all, When counter torque is produced in a generator, does that mean we have to apply MORE mechanical energy to sustain the output? Miyz,

I have heard that the melting/freezing point of helium is lower than that of hydrogen. Is this correct? if so why? My thoughts on this are that hydrogen has the lowest mass and therefore requires less energy than helium to be in a liquid or gaseous state, so it appears counter intuitive that...

What is the difference between induced electromotive force and counter electromotive force? The way they are generated seems the same to me. Can someone tell me the difference and how they are different?

Homework Statement I am working on a 16:4 MUX that is comprised of four cascaded 4:1 MUXs. Each MUX has an active-low enable pin. To enable one MUX at a time, I need to use a counter that outputs the following: Clock Cycle 1: 1110 Clock Cycle 2: 1101 Clock Cycle 3: 1011 Clock Cycle...

Homework Statement For the counter shown below, determine the main cycle, and for each of the unused states, show what happens if it starts up there. http://i45.tinypic.com/33l1lhc.jpg Homework Equations N/A The Attempt at a Solution I thought I knew how to do this, but after some...

Homework Statement Find a counter example to show that the following is invalid: ∃xP(x) ∧ ∃x(P(x) → Q(x)) → ∃xQ(x) Homework Equations - The Attempt at a Solution Well, I have tried to find something related to properties of numbers but found nothing... Then I tried to mess...

This is not a homework question I encountered this while revisiting the Electric Dipoles . First of all if someone explains me why the dipole So in the image above which way should the dipole rotate ? Anti Clock Wise or Clock Wise . What My intuition says is the Energy of a dipole is...

Hi guys. I'm wondering if someone could explain why when trying to make a 3 bit up/down counter using T flip flops, there are two and gates connected to the final multiplexer ? Can someone explain how you approach this? And same with the JK Flip flop but with an xor gate. I'm really...

Homework Statement Design and implement a synchronous 3-bit up/down counter with the following decimal code sequence: 0,1,3,5,7,6,4,2,0,… The counter should count “up” when an UP/DOWN control input Y is 1, and count “down” when the control input is 0. Counting “up” decimal...

frequency counters has got an influence upon me i would like to know how it works and if possible how to make one

Homework Statement To create a mod counter using flip flops that counts from 5 down to 2 and repeats this cycle...example 5, 4, 3, 2, 5, 4, 3, 2, 5, 4, 3, 2... The Attempt at a Solution I currently can get it to count from 7 down to 2 no problems...the issue is...I don't know how to skip...

Hi all, i am trying to do a counter using system verilog. The counter will count from 0 to 11 then back to 0 and start the counting again. Input = rdy, if rdy = 0, start counting. Output = count I have done the simulation for my code and it is not working as i prefer. It will...

Homework Statement Find the potential difference, capacitance of the Geiger Counter and the charge on the anode. So, we have a Geiger Counter with low-pressurized neon inside. What we want is to have an alpha particle or electron to travel into the Geiger Counter with enough energy to collide...

Hi Can someone please help me to prove or give a counter example is sum ai and sum bi are convergent series with non-negative terms then sum aibi converges I believe that if it doesn't say "non-negative terms" then this wouldn't be true. Am I correct? Since each of two non-negative...