Capacity Definition and 639 Threads

can you please state some liquid which is a good heat conductor (which have low specific heat capacity)

Homework Statement To summarize, I am given 6 objects and their corresponding specific heat capacity and thermal conductivity values. All objects have the same mass. The question is asking me to rank the objects based on temperature if they are put in a hot oven until they reach thermal...

Homework Statement Finding the specific heat capacity of an unknown metal. A cylinder was placed into boiling water, originally at 24.2 C. The heat transferred from the metal, and the water then was 29.5 C. Original Temperature-24.2 C Temperature after the metal has been placed into the...

"What is the specific heat capacity of a 50-gram piece of 100 degree C metal that will change 400 grams of 20 degrees C water to 22 degrees C? Could someone please explain to me how to do this problem? I have to figure it out on my own because my teacher is no help at all. Thanks in advance.

Calculate the heat capacity ratio for a diatomic ideal gas. ---- Using the equipartition theorem, I calculate: Cp / Cv = (Cv + R) / Cv = (7/2 R + R) / (7/2 R) = (9/2 R) / (7/2 R) = 9/7 ~ 1.286 According to the equipartition theorem, I assign each vibrational degree of freedom 1 R and...

Hi, I'm having difficulty with an assignment. Briefly, the question relates to a simply supported I beam containing a UDL and a point load. I've calculated the maximum bending moment resulting from these loads (neglecting beam mass) to be 5625kNm. I must select a universal beam from grade...

I am looking for a resistor that can dissipate a constant amount of heat at all temperatures immediately. I have been using some metal film/oxide resistors, but it takes a very long time before the resistor starts radiating heat. I think the material making up the resistor has such a high...

Homework Statement Quistions: 1-adding the same amount of heat to two samples does not produce the same increase in temperature. What physical parameters of hte bodies might be different? 2-We have a sample of metal with mass m. We supply an amount of heat Q and the temperature rises...

Homework Statement The specific heat of a certain metal can be determined by measuring the temperature change that occurs when a piece of the metal is heated and then placed in an insulated container that is made of the same material and contains water. Suppose the piece of metal has a mass of...

Hello, everyone. Homework Statement Now, I recently did an experiment in school to determine the Specific Heat Capacity of rubber using a calorimeter. We're using the mixing method to figure it out. The mass of the calorimeter, rubber and water was measured. And the S.H.C is already known...

Homework Statement Below about 80 K the heat capacity at constant volume for hydrogen gas (H2) is 3/2k per molecule, but at higher temperatures the heat capacity increases to 5/2k per molecule due to contributions from rotational energy states. Use these observations to estimate the distance...

Is it possible to find specific heat capacity given mass, initial and final temperature, and time? The liquid in question has not been given

1. The tangential frictional force exerted by a band brakes on a rotating metal drum of circumference 0.25m is found to be 20N. If the mass of the drum is 0.4kg and its specific heat capacity is 0.35 kJ/kg K, calculate the number of complete revolutions of the drum are required to increase its...

Hello everyone. I have a need concerning a project I'm building. I need to know, or need to know how to calculate the maximum uniform load on a single cantilever of A36 steel tube. It is solidly attached at one end and extends out 42". The material will be one of the following: 1) 2"x2"x 1/4"...

Homework Statement Calculate the standard enthalpy change (##\Delta H##) at 25 degrees Celsius and 927 degrees Cesius for the reaction, WCl4(g) + CH4(g) = WC(s) + 4HCl(g) Data: WCl4(g): ##\Delta H298## = -336 kJ/mole; Cp (heat capacity at constant pressure) = 105.6 J/mol*K HCl(g): ##\Delta...

Hi, I was woindering if anyone can help me on a problem I have been stuck on for a while now. I have an equation to combine the heat capcity of oil and water, but I can't find an equation anywhere that combines the heat capacities for water oil and gas. All i have is CpL =...

Hi, Can someone please give me some suggestions on how to use a microwave oven to determine the specific heat capacity of tap water? This is not a homework question, but an assignment and I have absolutely no idea how I can do this.This experiment will be done at home, so please no immersion...

Homework Statement Is it possible to convert ml to grams for a Heat Capacity and Specific Heat type of problem? The problems that I have done so far did not use ml at all. I am stuck with the following problem: A piece of stainless steel (specific heat = 0.50 J g-1 oC-1 ) is taken from an...

For a gas that obeys the equation of State P(v-b) = RT, where b is a constant, show that Cp is independent of Pressure, i.e., (\deltaCp/\deltap) at constant T is equal to zero Homework Equations Maxwell Relations H = U+PV dh = TdS + PdV dh/dT at constant P is defined as Cp The...

Homework Statement Why would vibrational and rotational degrees of freedom affect the heat capacity ratio more for N2 and CO2 than He or Ar? Would this occur at room temperatures? Homework Equations d.o.f.: 3N vibrational d.o.f., linear molecule: 3N - 5 nonlinear: 3N - 6 The...

Hi, I have some question about the full well capacity and dynamic range of the CCD camera. The following link lists some full well capacity and dynamic ragnes of some CCD cameras: http://www.andor.com/learning/digital_cameras/?docid=321 My question is how they obtain the electron numbers...

Homework Statement Derive the following expression for calculating the isothermal change in Constant Volume Heat Capacity: (dCv/dV)T = T(d2P/dT2)V Homework Equations The Attempt at a Solution I have no idea, please help

Homework Statement Lifts usually have signs indicating their maximum capacity. Consider a sign in a lift that reads “maximum capacity 1120kg or 16 persons”. Suppose that the weights of lift-users are normally distributed with a mean of 68kg and a standard deviation of 8kg. (a) What is the...

Homework Statement Make that specific heat capacity xD Well anyways, I did 5 trials trying to calculate the specific heat capacity of copper. I measured the temperature of metal, initial temperature of water, final temperature of water, calorimeter mass, mass of water etc. When I'm...

Homework Statement Plot the heat capacity as a function of temperature for aluminium, using the Einstein model. Homework Equations The Einstein model for heat capacity: The Attempt at a Solution The model assumes that the frequencies of all the harmonic oscillators in the material are...

Homework Statement A quantity of 100g of ice at 0°C and 50g steam at 100°C are added to a container that has 150g water at 30°C. What is the final temp of the container? Ignore the container itself in the calc. Homework Equations Q=mc (change in T) Q=mLThe Attempt at a Solution I know how to...

i found the average specific heat of a metal through an experiment it is 200. my only problem now is identifying it. i have tried many website but can't find anything useful please make some suggestions

Hi, I going to interface a microcontroller with SD flash memory card for data log. How to caculate the needed memory capacity? Thanks

simple application please..o:)

Sir, I stuck with a project. It is a bearing supported 5 Meter long cylinder with 1.5 meter diameter and weighs approximately 8 tons. At first stage I need to rotate this cylinder from 0-200 RPM within 1 minute and keep that RPM for 10 minutes and again from 200-1200 within 1 minute and keep...

can anybody tell me how the specific heat capacity varies with pressure and temperature for superheated vapors thanks

Hello - I was looking at costs of compressors online and could find a couple of links that provided me $ for the power I was looking at. As the power increases, $/kW decreased. The range of kW that these websites could give me cost for was well below what I was looking at. Can someone help...

I just picked up an older computer (Dell with XP) to substitute for and eventually augment a machine that has turned boat-anchor on me (I'll get to that one at a later date). The main problem is the readings I get from "my computer" of the remaining "free space". Sometimes it reads as low as a...

Homework Statement to determine the specific heat of a metal alloy, a 0.150 kg of the substance is heated to 400 degrees C ad then placed in a 0.20 kg aluminum calorimeter containing 0.40 kg of water. if a 14 g of ice is placed on it and the mixture reached the temperature of 30.5 degrees C...

what is the spec heat capacity of bronze?? pls tell me..i can't find on the net and it's the only thing i need to solve my homewrk problem..

Hi, I'm sorry if there have been loads of posts about this, but I'm hoping someone can help me out here. I'm making a pit to service a locomotive, this pit needs to be 10 feet wide (width along the rails), inorder to support the weight of the locomotive we have decided to run I-Beams under...

Homework Statement A system posesses three energy levels E1=ε, E2=2ε, E3=3ε with degeneracies g(E1)=g(E3)=1 , g(E2)=2 Find the heat capacity of the system. Homework Equations Z=e-βε+e-2βε+e-3βε d2lnZ/dβ2=kT2C The Attempt at a Solution i got the partition function and then...

Just revising for my practical physics exam tomorrow and got stuck on this! not sure if its correct, just annpyed me that i was unsure! Homework Statement A vending machine for serving hot drinks has a tank of capacity 7.5 litres, and the manufactuurers say that 45 cups of hot water (at 99o...

Homework Statement Consider the anharmonic potential U(x)=cx2-gx3-fx4 and show that the approximate heat capacity of the classical unharmonic oscillator in one dimension is C=kb[1+(3f/2c2+15g2/8c3)kbT] Homework Equations U(x)=cx2-gx3-fx4 and heat capacity is C=dU/dT The...

Why does the cerebral cortex require a large surface area (demonstrated by the large number of folds and creases in it)? Surely the brain simply requires as big a volume as possible, to fit in more cells, as there is nothing outside the brain it needs to interact with.

what is" negative heat capacity"? what is "negative heat capacity"? what is the example of it?

A rectangular block of ice 5 m on each side and 0.5 m thick floats in seawater. The density of the seawater is 1025 kg/m3. The density of ice is 917 kg/m3. a) How high does the top of the ice block float above the water level? b) How many penguins of mass 19 kg each can stand on the ice...

When a 35 gram piece of some metal at 100°C is placed in water, it loses 775 calories of heat while cooling to 30°C. Calculate the specific heat capacity of this metal. Q = mc(DELTA)T T = 70 degrees C m = 35 g Q = 775 cal ?? When i plugged it in i got 0.34 but the program said it...

Lets assume an Alien race that's 1.2 billion years ahead of human civilization in terms of technology. Do you think they'd be able to store the entire internet in one of their single device? If not, then how much storage do you think they'd have? Discuss..

I'm looking to understand how to estimate the sound isolation capacity of a wall structure. With rising degree of detail will probably come an exponantial increase in complexity. I'm looking to start of, euhm,... gently. :shy: What I've gathered so far: -The impedance of the wall seems to take...

Homework Statement A drainage channel is to be made so that its cross section is an isosceles trapezoid. If the sides and bottom are all 1m in length, what angle, theta, will maximize the carrying capacity? Homework Equations Implicit differentation The Attempt at a Solution I...

Homework Statement hey guys I've got a question. 'calculate the amount of heat necessary to raise the temperture of 12kg of water from 15.4degrees to 93 degrees. My working= h=mCdelatT m=12000 C? Delta T=77.6K just wondering how i find C? (heat capacity) thansk for any help...

Homework Statement How much milk at 11 degrees Celcius was added to 0.16 kg of coffee at 91 degrees Celcius if the final temperature is 76.8 degrees Celcius? Homework Equations Well my teacher explained how to rearrange cm∆T = cm∆T to somehow come up with an equation to solve for the...

http://www.ph.ed.ac.uk/~pmonthou/Statistical-Mechanics/documents/SM9.pdf In the third last paragraph of p36, we are told that the Einstein model discussed in this lecture succesfully explains the low heat capacity of diamond - i can't however see how it does, or at least find an explanation...

Homework Statement How much ice was added to a 0.75 kg jug of lemonade at 15 degrees celcius if the final temperature of the jug is 8 degrees celcius? (Assume the lemonade has the specific heat capacity of water.) Homework Equations Q = cm∆T The Attempt at a Solution Well I think I...