Ice Definition and 963 Threads

Homework Statement ice hockey puck moving at speed V1 collides head on with a second identical puck moving towards it at speed V2. After the collision, the first puck slows down to speed v1 without changing direction. a)After the collision what is the speed v2 of the second puck? b)...

Homework Statement A rectangular block of ice containing a fossil measures 426mm x 264mm x 153mm with a total mass of 21.8kg Density of ice = 0.917g/cm3 Density of Fossil = 3.64g/cm3 What percentage of the block's mass is the fossil? Homework Equations Density = Mass/Volume...

I have never bothered much about ice cream, sort of yes i will eat one just for a change, i bought one from the ice cream van tother day and it changed my mind, either his ice cream is different or my taste buds have changed, any ways up, question is how many ways are there to make a basic ice...

An ice cube of 10g -10°C is placed in a lake that is 15°C.Calcule the variation of entropy of the system when the ice cube to reach the thermal balance with the lake. The specific heat of the lake is 0,50cal/g°C.:biggrin:

Homework Statement A 2.00 kg block of ice at 0.0˚C melts. What is the change in entropy of the ice as a result of this process? Homework Equations Q = mcΔT ΔS = Q/T The Attempt at a Solution Q = (2.00 kg)(2.1 kJ/kg*K)(273 K) Q = 1092 J ΔS = 1092 J / 273 K ΔS = 4 J/K...

I recently read a thread that pointed to some constants that caught my attention. Before I go off the deep end with a question it would seem to be a good idea to understand exactly how constant are certain constants. I'm specifically curious as to the constants of: Length of a day (sidereal...

Hi guys, I have been trying to model mechanical eff. of an ICE. I have two methods for that one using: \etam = \frac{bp}{bp+fp} where bp = brake power fp = friction power This method did not work well because of bad assumptions in fp. So I decided to calculate the...

Homework Statement A 50-g of ice, initially at 0.0C, is dropped into 200 g of water in an 80-g aluminum container, both initially at 30C. What is the final equilibrium temperature? (Specific heat for aluminum is 900 J/Kg*C, the specific heat of water is 4186 J/Kg*C, and...

http://sciencenow.sciencemag.org/cgi/content/full/2008/620/2 This article is about Martian ice. Why can't it be dry ice? Why are the scientists so sure that it is water ice?

http://www.itwire.com/content/view/18901/1066/ This just popped up. I guess more news services will have it shortly.

the sea level shouldn't rise? Water takes up more volume as a solid than a liquid right. So why all the fear that we will all be run over by the sea from melting polar ice cap? The sea levels shouldn't change at all right? What am I missing here?

How much heat is needed to convert 1 kg of ice at −100C to steam at 1000C?. Remember ice and water do not have the same specific heat. I can use the relation for specific heat?

Hi! I'm new to the forums and this is the first that I'm posting something :D! I have a quick question from my textbook that I got wrong. Can someone please help me out! Thanks in advance! Question: An ice cube is floating in a glass of water that is filled entirely to the brim. When the...

Homework Statement Hi, I need some help with a homework assignment I have, the scenario is as follows: The Saudi Arabian government has decicded to look into towing a large iceberg from Antarctica to solve problems with low water supply. As their top physics advisor, you are to explore the...

Homework Statement a bath contains 1000 grams of water and 100 grams of ice in thermal equilibrium. at some point in time a 500gram block of stone(granite) at 100 deg celsius is added to the bath a) what is the temp of the bath before the block of stone is added b) what is the temp of...

The very recent Phoenix landed on Mars to examine soil and scrap ice etc. Just a prelude to a more sophisticated rover pending. But what if Mar's ice is a billion + yrs old, and hard as marble, perhaps? A new form of ice, not seen, nor conceived yet, on earth? Perhaps drilling; but not a core -...

http://news-info.wustl.edu/tips/page/normal/11767.html 25 May it will parachute down and at the last moment let go the chute and use retrorockets it will not land on the polar icecap itself but on a level plain where they think there is ice a foot or so down below surface it has a...

..and he brings in his arms to decrease his moment of inertia in order to increase his angular velocity, that means the rotational kinetic energy increases. But that means there's a change in rotational kinetic energy, right? But wouldn't there be no external forces acting on him (assuming no...

I was wondering if it would be possible to get help with this question: A 400 gram block of ice at -6°C is allowed to warm to room temperature which is 28°C. If the sun provides 600 Joules of energy per square meter per second and all this energy was used to warm the ice block, calculate how...

Homework Statement A copper calorimeter can with mass 0.100 kg contains 0.160 kg of water and 0.018 kg of ice in thermal equilibrium at atmospheric pressure. If 0.750 kg of lead at a temperature of 255^{o}C is dropped into the calorimeter can, what is the final temperature? Assume that no...

A Carnot heat engine uses a hot reservoir consisting of a large amount of boiling water and a cold reservoir consisting of a large tub of ice and water. In 5 minutes of operation of the engine, the heat rejected by the engine melts a mass of ice equal to 3.40×10^−2 kg. Throughout this problem...

Homework Statement In an insulated vessel, 250 g of ice at 0 °C is added to 600 g of water at 18 °C. (a) What is the final temperature of the system? (b) How much ice remains when the system reaches equilibrium? Homework Equations The Attempt at a Solution If I'm not mistaken...

Homework Statement 0.175 kg of water at 88.0 degC is poured into an insulated cup containing 0.212 kg of ice initially at 0 degC. How many kg of liquid will there be when the system reaches thermal equilibrium?Homework Equations Qwater=-Qice q=mc(Tf-Ti) Cwater= 4187 J/kg degC Cice=2090 J/kg...

[SOLVED] Latent heat, steam and ice question Homework Statement 14g of steam at 100C is added to 47g of ice at 0.0 degrees C. a) Find the amount of ice melted and the final temperature. Homework Equations Q=mL Q=mc\DeltaT Q(hot)=-Q(cold) The Attempt at a Solution Ordinarily, in...

i need information about ice calorimeter please help me. hi all I need information about ice calorimeter. this is one type of calorimeters. and this is other types:- 1-coffe-cup calorimeter 2-bomb calorimeter. im found inforamtion about coffe-cup and bomb. now ineed...

http://www.reuters.com/article/blogBurst/science?type=scienceNews&w1=B7ovpm21IaD The Younger Dryas occurred at a time when orbital forcing should have continued to drive climate to the present warm state. The unexplained phenomenon has been the topic of much intense scientific debate, as well...

Homework Statement Ice at 0.0°C is mixed with 8 × 102 mL of water at 28°C. How much ice must melt to lower the water temperature to 0.0°C? Homework Equations Q = mc(delta)T The Attempt at a Solution c = 4.184 J/g K (delta)T = -28C V = 800 mL I'm not sure what to do since...

hi every1 what do you see if you look at ice through a standard microscope? is the structure too small to be seen? thanks charlie

True or False: As a stone slides down a frictionless ice covered hill its mechanical energy is concerved but its momentum is not. False- if mechanical energy is concerved so is momentum right??

Homework Statement If you mixed 200g if ice that is at -5°C with 20g of water that is at 15°C, what will be the temperature and condition of the final state once equilibrium is achieved? Homework Equations Q=mcΔT, Q=mLf The Attempt at a Solution I know that the amount of ice is...

The Specific Entropy of Water is 69.9J/K. What about ice? i did a search on the internet but couldn't find anything Please help

Homework Statement A very slippery ice cube slides in a vertical plane around the inside of a smooth, 20 cm diameter horizontal pipe. The ice cube's speed at the bottom of the circle is 3 m/s. a) What is the ice cube's speed at the top? b) Find an algebraic expression for the ice cube's...

Question: What is the best way to melt ice?

An ice skater starts a spin with her arms stretched out to the sides. She balances on the tip of one skate to turn without friction. She then pulls her arms in so that her moment of inertia decreases by a factor of two. In the process of her doing so, what happens to her kinetic energy? -It...

[SIZE="4"][FONT="Palatino Linotype"]Hi, This is my question: why is in the middle of ice, white ? (have you noticed ?) I guess the reason must be that water molecules don't have enough space to expand naturally and form symmerical crystals; and the white colour is because of this...

How can you make ice "sink"? Is there a way to attach water molecules in a fashion that in their frozen state, they would be denser than liquid and sink in water instead of float? Or is there some substance you could mix with it to create this effect, preferably an edible substance? I think...

Okay, if you have 1 kilomole of ice melting at 0 C and you have a given latent heat of fusion of ice as 3.348 x 10^5 J/kg and the density of ice as 917 kg/m^3 and te density of water as 999.9 kg/m^3, I don't understand how to find the work done. I know that work done is PdV, so it should be...

[SOLVED] Thermodynamics and ice melting. Homework Statement An open container holds ice of mass 0.585 kg at a temperature of -13.3 *C. The mass of the container can be ignored. Heat is supplied to the container at the constant rate of 800 J/min. The specific heat of ice to is 2100 J/Kgand...

Help...melting ice cube. Homework Statement How much time is needed for an ice cube ((1.5x1.5x1.5)m, 3tons of mass with two golden bars within an ice cube to melt. Average temerature of the month is 6.2 ˙C Thank you very much!

Aim: How does the volume of water at a given temperature affect the amount of ice that can melt in it? I did a lab experiment. I put ice in different volumes of water and waited for 5minutes. I measured the amount of ice melted and the final temperature of water. RESULT: (starting...

Hi, I have problems with charge distributions of buckets and other conductors which has a cavity. If there is experiments, photos, detailed examples about this kind of charges then glad to learn the links in net. Suppose have a conductor like Faraday ice bucket. And tied two un-charged...

Hi. My physics knowledge is very limited, but I know a decent amount. I would greatly appreciate it if you could explain in as much detail as you can. Thanks. That said. Imagine you have a container of water in excess. You have a mass M of ice floating on top of the water. Tied to the ice...

James and Ramon are standing 20.0 m apart on the slippery surface of a frozen pond. Ramon has mass 60.0 kg and James has mass 90.0 kg. Ramon pulls on the rope to give himself a speed of 0.70 m/s. What is James's speed? From what I understand, since there is an external force due to Ramon's...

Hey check this out: I put 3pieces of ice in a glass and then put water. I left the glass alone for about 5minutes. When i came back i realized that those 3 pieces of ices were a bit sicked one another. So what should be the scientific explanation?

Well... It is first first time on the Physics Forums, and I'm stuck on this problem: 1. A 2.5 kg block of ice at a temperature of 0.0 °C and an initial speed of 5.7 m/s slides across a level floor. if 3.3 × 10^5 J are required to melt 1.0 kg of ice, how much ice melts, assuming that the...

A 10g ice cube at -10C is placed in a lake whose temp is 15C, calculate the change in entropy of the cube-lake system as the ice comes to thermal equilibrium with the lake. specific heat of ice is 2220 J/KgK Homework Equations Q(released)=Q(absorbed) U=Q-W S=Q/T L(f)water=333kJ/kg...

Homework Statement A 300 cm3 glass is filled with 120 g of ice at 0°C and 210 g of water at 25°C. (a) Characterize the content of the glass after equilibrium has been reached. Neglect heat transfer to and from the environment. Find: mass of water? mass of ice...

Hi, having a problem with the ice sticking to the mould. I have to use alginate for the mould and when the water freezes, so does the alginate.The moulds are part of my art project and they take amazing detail. I don't know whether I'm making sense here but is it possible to use something in...

Is there anybody that can tell me if I'm doing this question right? Metallic Ca reacts with hydrochloric acid according to the following equation: Ca(s) + 2 HCl(aq) ---> 2 CaCl2 (aq) + H2(g) The enthalpy change associated with this reaction can be determined with an ice calorimeter. If...

Where are the in relation to the fuel lines on a Boeing 777