Ice Definition and 980 Threads

Homework Statement Part (a): Derive Clausius-Clapeyron Equation. Find latent heat of fusion of ice. Part (b): Find rate of formation of ice Part (c): What is the maximum thickness of ice formed? Homework Equations The Attempt at a Solution Part (a) I have derived the...

Sea level appears destined to rise at least 4ft. Anyone have data on how this will affect the world's coastlines? West Antarctic Glacier Loss Appears Unstoppable http://www.jpl.nasa.gov/news/news.php?release=2014-148 The 'Unstable' West Antarctic Ice Sheet: A Primer...

Homework Statement Keq at a given temperature is 4 2 HF (g) <--> H2 (g) + F2 (g) A 1 Litre jar contains 0.045 moles of fluorine at equilibrium. What was the initial quantity of hydrogen fluoride in the reaction jar? 2. The attempt at a solution I set the initial concentration...

10 g of ice at -20C and 100g of water at +5C is mixed together. How much water and ice will there be once the system reaches equilibrium (assuming no heat is lost)? Specific heat of water and ice: 4.186*10^3, 2.108*10^3 Latent heat of fusion of ice: 333.55*10^3 All in units (kg^{-1} *...

Homework Statement A thin stick of length L is balanced vertically on frictionless ice. It then tips over and falls. How fast is the center of mass of the stick moving just before it hits the ice? The Attempt at a Solution using energy: I = \frac{1}{3}mL^2 .5Iω^2 = mgh .5Iω^2 =...

Homework Statement In an attempt to quickly make iced tea, three 50 g ice cubes with a temperature of -10 C are added to 250 g of tea with a temperature of 50 C. After a short time, the system reaches equilibrium. Ice has a specific heat capacity of 0.48 kcal/kg/K and the latent heat of...

Hi I tried cooling down some 91% isopropyl alcohol with dry ice. After a few minutes, the alcohol became a thick gel. I am wondering what is going on there, thanks.

When using ice to keep a room (or in my case, a cooler) cold, one would want it to have a high specific heat capacity and a high latent heat of fusion, so that it would absorb a lot of energy as it melts. Basically, so that it melts as slowly as possible. I know that adding salt to road ice...

When we look into the ice cubes, there is a white colored part in the middle(inside at the center). I google searched and most of them say it's the colour of the gases trapped inside when it froze. But there are no white coloured gases inside. is there? let's take oxygen, its a colourless gas...

[b]1. If we drop an ice cube in a glass of water ,check the level of water & let it melt, what happens to the water level afterwards? Does it rise, remains the same or lowers? Homework Equations The Attempt at a Solution

I was sitting by a camp fire this weekend and I noticed that the snow/ice around the fire was melting in a strange way and I couldn't think of a good reason as to why it would leave this pattern. Essentially, it looked like small icicles all aimed towards the fire, almost parallel to the ground...

Attached you will find a parellel hybrid design of a Porsche Cayenne hybrid. From what I understand,its the ICE(combustion engine) that is finally delivering power to the differentials.This power is 'substantiated' by power delivered from an electric motor.As you can see from the diagram,the...

Would it work/be practical to build a desalination system in a place that has high mountains near coastal areas? In places like the Atlas mountains of Africa and the Andes in Chile which are near coasts & deserts yet high enough to be snowcapped it may be ideal. Water could be brought to the top...

Homework Statement 0.05625 m^3 of H2O(s) is added to a thermally isolated system of 20 L of H2O (l). If the ice was initially at 0 C and the liquid water was initially at 95 C, what is the final state and temperature? The Attempt at a Solution I missed class for this so I'm going by...

Homework Statement You are asked to mix equal masses of of ice and steam at 0.00°C and 100.00°C respectively, What will the final temperature of the mixture be? The mixture is in a perfect insulator. ms=mass of steam mi=mass of ice LHV,s=Heat of vaporization of steam=2257J/g LHF,i=Heat...

Homework Statement An ice cube at 0.00 °C measures 14.9 cm on a side. It sits on top of a copper block with a square cross section 14.9 cm on a side and a height of 18.1 cm. The bottom of the copper block is in thermal contact with a large pool of water at 92.5 °C. How long does it take the...

Homework Statement Suppose 337g of water at 32.9°C is poured over a 59.3g cube of ice with a temperature of -5.67°C. Does all the ice melt? If all the ice melts, what is the final temperature of the water? If all of the ice does not melt, how much ice remains when the ice-water mixture reaches...

Homework Statement This was the procedure for the lab: Find the mass of the Styrofoam cup. Half fill it with warm water at a temperature of about 50 degrees C. Determine the mass of the water and the cup. Dry off some small pieces of ice with the paper towel. Record the temperature of...

Homework Statement ice needs to be at least 6.76 feet thick. = 2.0604m Currently the ice is 5.78 feet thick = 1.7617m Later, there is a cold spell If the average temperature during the cold spell is 23.23°F =-4.8722C = 268.277K and the water temperature is 32.0°F = 0C = 273.15K...

Homework Statement A skater is gliding along the ice at 2.4 m/s, when she undergoes an acceleration of magnitude 1.1m/s^2 for 3.0s. At the end of that time she is moving at 5.7 m/s. What must be the angle between the acceleration vector and the initial velocity vector? The Attempt at a...

Please help. Ice is more denser than water when temperature of water ≥9°C. Then why ice doesn't sink in water at these temperatures? I greatly appreciate your help. Density chart: http://www2.volstate.edu/chem/1110/Density_of_Water.htm

First,this is what I understood from theory: If I understood the concept of 'engine stall' correctly,it occurs as a result of the engine not having enough time to adjust for a increased load. As a practical example of engine stall,I consider the instance of 'letting go of the clutch pedal'...

Homework Statement You are going on a long trip in the summer with a dessert that must stay cold. You have a cooler with the interior dimensions measuring 13 in x 8.5in x 11 in. The cooler has 1.75 in of polyurethane foam insulation. The dish is in a water tight container so food getting wet...

I was fortunate to spend a few weeks recently with the director of Chasing Ice, Jeff Orlowski. http://blogs.crikey.com.au/cinetology/files/2013/04/jefforlowski.jpg I'm going to plug Chasing Ice because it's an amazing film. Jeff along with EIS (http://extremeicesurvey.org/) filmed glaciers...

http://www.theverge.com/2013/11/28/5154240/north-dakota-river-ice-circle-is-50-foot-wide

In other words, why are ice cubes trays shaped like the left-hand figure instead of the right-hand one? If the cube were more square-shaped like the second figure, it would have more volume, thus having more ice in total and keeping the drink cold for longer. I also suspect it would be...

Homework Statement An Ice skater of mass m = 70kg is initially traveling at a speed v = 4 m/s along a straight path that brings his center of mass to within a distance b = .6m of a vertical pole fixed in the ice. He reaches out with his hand as he passes the pole and hangs on so that he pulls...

Homework Statement A small lump of ice is sliding down a large, smooth sphere with a radius R. The lump is initially at rest. To get it started, it starts from a position slightly right to the sphere's top, but you can count it to start from the top. The lump is fallowing the sphere for a...

This an extra voluntary question on a physics assignment I've already handed in. But I still want to try and figure it out so here goes: Homework Statement This is what I'm told: "You take 100 g ice cubes from the freezer. The ice cubes' temperature is -18°C." The specific heat capacity...

Homework Statement How much heat is required to convert 200 g of ice at -9°C to water at 9°C? Homework Equations I tried the equation Q= cmT. So I took 200 g x 1 cal/gram x 18 degrees. This was incorrect though. The Attempt at a Solution Attempt shown above. Any help would be...

1.At constant temperature of 258K and constant pressure of 1.000 atm , super cooled liquid water (2.00mol) freezes irreversibly. Find the change in enthalpy(ΔH) by assuming that Cp,m of liquid water and ice are 75.48 KJ/mol and 37.15KJ/mol and are constant. (this problem was from my assignment...

Homework Statement consider the following reaction: 2H2O(i) <-> 2H2(g) + O2(g) kc=7.3*10^-18 at 1000oC The initial concentration of water in a reaction vessel is 0.055 mol/L. What is the equilibrium concentration of H2(g) at 1000oC? Homework Equations h20 h2...

In those days ice was transported from mountain regions to towns and cities, so that, for example, wealthy families could have interesting desserts at their banquets. And I imagine some market-sellers might have used it to keep their produce fresh - displaying sea-food in an ice-tray, for...

Hello - first post to PF. I was making my iced coffee this morning as usual by pouring hot, freshly brewed coffee atop a large cup of ice. I then began to wonder about the thermodynamics of this situation. Will the dV/dt (V=volume, t=time) affect how quickly the ice melts? As I pour in the...

Homework Statement A ball of ice is thrown against a wall with such as speed than the ball of ice evaporates. Is this process reversible? Homework Equations if entropy doesn't change, process is reversible. The Attempt at a Solution I'm pretty darn sure the answer is no, but I am...

Q: Consider the solid that lies above the cone z=√(3x^2+3y^2) and below the sphere X^2+y^2+Z^2=36. It looks somewhat like an ice cream cone. Use spherical coordinates to write inequalities that describe this solid. What I tried to do: I started by graphing this on a 3D graph at...

SOLVED - Just a quick check for my solutions - ice patch friction Homework Statement Say you (65kg) take a brisk ice skate across a frictionless lake when suddenly you hit a rough patch of ice that's 10 m long with a coefficient of friction (0.02). If you were traveling at 75 m/s before you...

Homework Statement When water freezes it expands by about 9.00% What pressure increase would occur inside your automobile engine block if the water in it froze? ( The bulk modulus of ice is 2.00*10^9 N/m^2 Homework Equations Bulk modulus = ΔPressure/(ΔVolume/Initial Volume) The...

I knew ice was slippery, but looking at a table of coefficents of friction today it seems that ice on ice yields a lower μs value than even teflon on teflon. Is that really true? If so, does ice have much of an application as a lubricant or anti friction surface outside of skating rinks...

Energy math question -- Energy to melt lake ice sheet Homework Statement Lake Champlain bordered by New York, Vermont and Quebec has a surface area of 1, 126 km^2. If it freezes solid in the winter with an average ice thickness of .5 m, how much total energy does it take ti melt the ice...

How to get there -- Ice Physics Something I have always dreamed of doing is working in the arctic and doing research on something in the physical sciences whether it be atmospheric sciences, glaciology or some sort of ice physics where they are taking samples of the ice and doing research on...

Though this topic mentions climate change, I don't think it really is about it that, strongly anyway. I've just joined and noticed a ban on climate change discussions before posing this one, I don't think this is one, but if it is, I suppose the beast must have one of it's many heads chopped...

I'm looking for some engineering types to have a play around with my thermodynamic model of an internal combustion engine and reply with any thoughts, errors they find, spurious results or anything else which doesn't seem quite right...

Homework Statement To put it simply, there are 4 different flavors of ice cream, and 6 different toppings. a)how many sundaes are possible using one flavor of ice cream and 3 diff toppings? b)How many sundaes are possible using one flavour of ice cream and from 0 to 6 toppings? c)How many...

I am doing a simple thermodynamic analysis. Couldn't get thermodynamic values (such as internal energy, exergy, and so on) from common data base of CO2. I looked it up in REFPROP(By NIST) and EES. None of them have data below 212K. At one atmosphere CO2 sublime at about 195K. Could anyone...

Homework Statement How do I calculate the following. The final temperature of a mixture of of ice and water. Where 176grams of ice at -10celsius mixes with 206 grams of water at 73.3celsius. I have tried this equation in multiple fashions and cannot seems to come to a consistent answer! Any...

Hello, How do I calculate the following. The final temperature of a mixture of of ice and water. Where 176grams of ice at -10celsius mixes with 206 grams of water at 73.3celsius. I have tried this equation in multiple fashions and cannot seems to come to a consistent answer! Any help would be...

Homework Statement I am working through a couple of revision sheets and have questions about the following two questions: 1) A)An ice cube of mass 0.03 kg at 0C is added to 0.2 kg of water at 20C in an insulated container. (a) Does all the ice melt? (b) What is the final temperature of the...

Hi. I will soon wrap up my physics bachelor and have lately been considering specializing in modelling of ice thawing and freezing processes. What types of math and physics are involved in those kind of processes and what subjects should I make sure I know. What classes would be useful...

Homework Statement A stationary car on black ice (no friction) is on a banked road and begins to experience some acceleration. What force is causing the acceleration? a) The horizontal component of the normal force b) The vertical component of the normal force c) Gravity Homework Equations...