Lost Definition and 576 Threads

Homework Statement An alcohol rub can rapidly reduce an elevated body temperature in a patient. The heat energy lost by the person is due to the evaporation of alcohol. Find the number of grams of alcohol that must be evaporated from the surface of a 75 kg person to reduce the body...

Please will someone consider this with me When a simple water heater burns (a propane/air mixture, for example) is energy lost when the resulting gases expand into the atmosphere? Up the exhaust flue of a domestic boiler for example. Is this how steam turbine powered ships lose out...

Hello all, Named this WORK because I don't know if a am talking about Force or Torque ! I am trying to do up a M20 nut on a shaft - would like to tighten to say 200 N.m which I can do with my scawny arms and a 400mm long spanner. BUT the situation doesn't allow for me to actually place the...

And wonder where it wound up? It probably wound up in Scottsdale, Alabama. You can go there and buy your stuff back. The Unclaimed Baggage Store You can even buy back your underwear, or maybe even in the goose you had stuffed in your luggage. I think that green jacket might be mine...

Homework Statement A student has learned answers to 40 questions out of 60. A student has to pick 3 questions. What is the probability, that the student will know: a) all 3 questions b) exactly 2 questions c) at least 2 questions The Attempt at a Solution a) So all the...

Hi there, If a proton passes through a loop of wire, it induces a tiny current in the wire. Will the proton lose energy and slow down as a result of this? If so, by how much?

Homework Statement 1. Calculate heat lost by the hot water in the calorimeter. Initial temp: 22.90 C Finial temp: 23.25 C Density: 1.00 g/mL specific heat capacity: 4.18 J/gK Homework Equations qmetal=-(qwater+qmetal) q=m C dT The Attempt at a Solution When i use the second...

Homework Statement ive been trying to figure our this mechanics question and I am rather stuck but unfortunately i haven't had much experience with moments find the normal forces applied to the installed stud at points A and B [PLAIN]http://img851.imageshack.us/img851/1826/photoc.jpg...

It's basically that cable that hooks up your computer to your Ti to download programs. I lost it, is there anyway to recover it? I went to Amazon and found one, but the cost to ship it is even more expensive than buying a new one... Anyone know any better way?

Homework Statement The aluminum cable of a high-voltage transmission line carries a current 600A. The cable is 60km long, and it has a diameter of 2.5 cm. What is the power lost to Joule heating in this cable? Homework Equations Should I use the equation V=1/(4piEo)integral(dq/r) to...

"Lost City of Atlantis, ... may be found" http://news.yahoo.com/s/nm/us_tsunami_atlantis

Lost Voice... I developed a sore throat and my voice is starting to fail me. I was wondering if anyone knows any good methods for soothing the throat and regaining one's voice. Currently I am drinking some peppermint herbal tea with a bit of honey. I think when I worked at the coffee house...

I'm in the penultimate year of my MPhys degree and I am on track to get a 2.1 I am good friends with the people in the year above me and speaking to them has made me feel a little lost re: careers. Medical physics is something that really interests me, and something I was planning on...

1. Homework Statement [/b] A neutron (mass 1 u) experiences an elastic head-on collision with a gold nucleus (mass 197 u) that is originally at rest. What percentage of its original kinetic energy does the moving particle lose? Homework Equations Elastic Collision: V1f=...

Homework Statement It is observed that 55.50 mL of water at 20 degrees C completely fills a container to the brim. When the container and the water are heated to 60 degrees C, 0.34 g of water is lost. Density of water at 60 is 0.98324 g/mL. I don't need help with solving it. I just need...

Homework Statement I have three capacitors and a resistor in a closed circuit. I'm given the values of C: 15,20,10pF. They are all in series. The magnitude of each is 3.5nC. Homework Equations t = -RC ln(q/Q0) I = -Qo/RC e^(-t/RC) The Attempt at a Solution i've tried finding time first...

Homework Statement I'm trying to show that not all (half) of the energy supplied by the power supply ends up in the capacitor when the capacitor is charged through a resistor. I've looked at some of the other threads on these sorts of topics and I'd thought I'd have a go at working through it...

I understand that i should post all relevant work that I've done, but i don't even know where to start, in the serway 8th edition chapter 3 this problem is listed, i read all of chapter 3 yet still can't even attempt this problem. It's for my online homework which is due monday morning and was...

Hey :D, I'm doing an experiment to determine the energy lost of a ball after each bounce. I am doing this experiment to 3 types, tennis ball, squash ball and ping pong ball. I have already determined what I need to do to work out the energy lost of a ball as a percentage after each bounce...

I've always wondered about how thing like the pyramids, the sphynx, stonehenge, etc... become mysteries although the area has supposedly been continually occupied since their creation. I mean in every generation aren't these things odd enough that someone would ask "what is that and where did...

Now a little thing I should say first, I have no problem with fitting in a group and having friends/girlfriends etc. Also perhaps I should mention I am bipolar so some things may be a bit out there from normal thought. That being said, I sometimes do feel out of the social world. I can be in...

inelastic collision...kinetic energy lost? Homework Statement a bullet with a mass of 6 g is fired through a 1.25kg block of wood on a frictionless surface. initial speed of the bullet is 896 m/s and speed of bullet after it passes through it is 435 m/s. what's the final velocity? how much KE...

Lost Civilization May Have Existed Beneath the Persian Gulf http://news.yahoo.com/s/livescience/20101210/sc_livescience/lostcivilizationmayhaveexistedbeneaththepersiangulf

I'm doing a research project on collisions and I've come across a part of my theory that requires solutions to coupled damped oscillators. Could anyone please refer me to some text on 2 coupled damped oscillators which isn't extremely math heavy and has conceptual explanations of the...

Homework Statement Using AND, OR, NOT, NAND, NOR gates construct a circuit for the following problem 7. One of the more interesting public works problems is the “Superbowl” problem. At the beginning of halftime during the Superbowl, 35 million toilets are flushed almost simultaneously...

Homework Statement A heat conducting rod, 0.90 m long, is made of an aluminum section, 0.10 m long, and a copper section, 0.80m long. Both sections have a cross-sectional area of 0.0004m^2 The aluminum end and the copper end are maintained at temperatures of 40C and 150C respectively. The...

Homework Statement When a uranium nucleus at rest breaks apart in the process known as fission in a nuclear reactor, the resulting fragments have a total kinetic energy of about 200 MeV. How much mass was lost in the process? Homework Equations K=Ymc^2 - mc^2 Im sure you can figure out...

I have been taking an introduction to thermal/quantum physics course, and we are passing over quantum right now, and my teacher has us completely bewildered. This course is pre-differential equations, so most of the stuff is broadly explained, and the book has almost no examples for direction...

Hi, I am a physics undergrad designing a solar spectrometer as part of a senior design type course. If we have light incident from the sun onto some sort of telescope objective (say a single lens for simplicity, focal length "f" and aperture radius "R") and then a pinhole at the focal point...

Homework Statement A bullet of mass mB = 0.0115 kg is moving with a speed of 104 m/s when it collides with a rod of mass mR = 7.93 kg and length L = 1.05 m (shown in the figure). The rod is initially at rest, in a vertical position, and pivots about an axis going through its center of mass...

A mass M is at the top of a rotative arm, with a radius R, at a certain speed V. Lets take M=60kg, R=5meters and V=10m/s. We assume the movement generated from some kind of natural source (wind, water..), is permanent and constant, and there is no loss (100% efficiency). How many watt of...

Homework Statement First of all, sorry for my bad english. I have this problem and I've been trying to come up with something for 1h without success. A circuit is "given" 100kW (100 000W) The total resistance of the cables the electricity goes through is 5 ohms. The voltage difference...

A block having mass m and and a charge +Q is connected to a spring having a constant k. The block lies on frictionless horizontal track, and the system is immersed in a uniform electric field of magnitude E, directed east. If the block is released from rest when the spring is unstretched ( at...

A worker pushed a 27 kg block 7.4 m along a level floor at constant speed with a force directed 28° below the horizontal. (a) If the coefficient of kinetic friction is 0.20, how much work was done by the worker's force? Magnitude of the x component of the applied force = - Magnitude of...

I am totally lost :( Homework Statement http://i578.photobucket.com/albums/ss223/fuyu0201/feb61411.jpg Homework Equations umm, i have no idea. the teacher didnt really teach us this yet. The Attempt at a Solution i just added all the lengths together lol, but that was wrong.

When I first started high school, I was pretty dead set on being an engineer. Now, it's college apps time, and I'm more clueless than when I started. Why? Over the years I've become more and more tired of math. Geometry was fun - but starting from Algebra I've felt like a human calculator, to...

I think that pretty much describes this topic. I'm in Calc ATM and realized that I've forgotten many ideas from previous math classes. I don't have most of my notes as it was mostly problem solutions anyway, furthermore, that's not really what I want. I want to start from Algebra I...

High school stats: 1860 Sat 87-88 GPA Top 33% No extra currics. I got into a nice state school but couldn't afford it (I got 20K but still came short by 10-15K). Now I am at a Community College. I am taking Bio 102/Pre Calc/Engl 101/Speech 101. I want to finish my 2 year Associates in...

Homework Statement A typical power station produces 1000MW of electrical energy. Seven percent of the power is lost in a 500kV transmission line. Whats the lines resistance? Homework Equations P=I2R The Attempt at a Solution Thought this problem was simple but I keep getting it wrong. P=I2R...

[SOLVED] Projectile Motion problem. very lost. Homework Statement A person is traveling in an accelerating car. He throws a ball in the direction the car is acceleration with a velocity of vo. In the final condition, he catches the ball. Note the car begins accelerating after the ball is...

Homework Statement A marble is thrown horizontally with a speed of 12.0 m/s from the top of a building. When it strikes the ground, the marble has a velocity that makes an angle of 30.3 ° with the horizontal. From what height above the ground was the marble thrown? -im lost at where to...

Homework Statement A man seeking to set a world record wants to tow a 101,000-kg airplane along a runway by pulling horizontally on a cable attached to the airplane. The mass of the man is 77 kg, and the coefficient of static friction between his shoes and the runway is 0.82. What is the...

Homework Statement Heather and Matthew walk with an average velocity of 0.98m/s eastward. If it takes them 34 min to walk to the store, what is their displacement? Homework Equations V avg = Δx/Δt (since I'm looking for the displacement I changed it to) Δx=V avgΔtThe Attempt at a Solution...

I am still confused about this. say, we are in a constant moving truck, we pushed the back of the truck, so we provide the force F on the walls of the truck, towards the rear. but the truck moving with constant velocity and has traveled a distance of say x. we do the work according to an...

the problem statement is attached. i've begun by converting everything into phasor notation but I'm not quite sure where to go from here. when i try to add the C and the L phasors, i get zero. this doesn't seem right. another problem is i have no idea what to do when i get the impedances of...

I just started a EE class and the teachers just threw up there without really explaining everything. Everyone's lost. I tried to Google, but couldn't find anything. I have a breadboard, and I have a schematic I need to wire, but I do not really understand how to wire the VCC and ground...

I have been searching for explanations and formulas on this subject but have been hard pressed to find what I am looking for unfortunately. I would be appreciative if anyone could either provide some answers or any external resources they could point me to which has detailed information on this...

Dear readers, I have been thinking about this for a while and would appreciate it if anyone could kindly give me their input. It is a tragedy when people lose their limbs or are born without them. I have read that some other animals can regrow limbs if they are lost such as the newt or...

Homework Statement Well I was rather shocked when I got a four instead of a five and am wondering if I lost points for this. According to my teacher the way the college board states it is that student's must have a reasonable appreciation for significant figures and that is all. So during...

Question #1 Homework Statement How much heat will be lost when 120 g of steam at 100°C is condensed to water at 80°C?Homework Equations Q = mc∆t Q = m LV The Attempt at a Solution Q = mc∆t Q = 0.12 x 4186 x (80 – 100) Q = 10046.4 J Q = m LV Q = 0.12 x (- 2.3 x 106) Q = 276000 J = 10046.4 +...