Ice Definition and 963 Threads

I have an extremely old refrigerator. [and] I want to properly insulate the freezer part, fill it with water and make a large ice block. Then expose it to sunlight and see how it melts. Pure experiment. I need an idea of a hydrophobic material or something, so I can take the block out...

I'm curious about about an upper limit of temperature at which water can no longer exist in a solid state even as pressure increases. There are "ice" phase states such as VII and X which are apparently solid up to 600K under pressures over 10^9 Pa. Phase X is called a "proton ordered" state. Is...

I discovered this by accident and decided to duly inform the scientific community. Same great taste without the hassle (or the cold); it's faster & easier to consume (e.g. during the commute), so the question is, why isn't it marketed widely?

Metal inside a microwave oven --> ice? When I was younger, I placed water inside a tin pan and placed it inside a microwave. I tuned it on, sparks went everywhere and I quickly turned it off. I took the pan out and it was solid ice. How? A while ago I read an article in New Scientist that...

http://scienceblogs.com/catdynamics/2009/09/water_water_everywhere.php Nasa press release from 24 September. http://marsprogram.jpl.nasa.gov/mro/newsroom/pressreleases/20090924a.html Photos of fresh meteorite craters show white at estimated depths of 1 - 3 meters. The white material goes away...

Calculate heat of fusion.? find the heat of fusion of ice using the ffg. data obtained from an experiment: wt. of brass calorimeter = 50 g specific heat of brass calorimeter = 0.09 cal/g-°C m of ice= 20.45 g at 0°C TF= 20 °C mH2O = 200 g at 30°C

If I have a piece of ice melting in a water and eventually comes to equilibrium with the water... The the total enthalpy change includes the following right? Heat absorbed for ice to get to 0 degrees Heat absorbed for ice to melt to water Heat absorbed for the melted ice water to come to...

Does anyone go to Sonic Drive Thru? Man, they have some awesome crushed ice! The ice is a little under a cubic cm each, small, and I love it! Is there anyway to get ice like this at home? Some sort of super perfect ice crusher made from the most high tech, cutting edge materials man has ever...

In the thread about mammoths and climate scepticism, we have seen that the fossil remains of the Arctic Siberian mammoth steppe suggest that is was actually warmer than today, at least during summers. This mammth steppe existed throughout most of the final stages of ice age, the late Wisconian...

Anyone who lives where it's cold enough to freeze water pipes can relate to the following question. Is it possible to measure or calculate the force of the expansion when water freezes? I hope that makes sense? I have seen everything from schedule 40 PVC crack and bust open and of course...

Does anyone know why you can see the smoke coming from dry ice? Is it actually CO2? It does not make sense to me, why could I see CO2 evaporating, but I cannot see it normally? Is it the moisture in the air that I can see reacting with the cold CO2?

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...

as the topic asks but, if i want to know the energy of the 0 Centigrade melt into 0 Centigrade water, how to calculate it? i mean i don't know how to use the equation Q=c*m*t, 'cause the specific heat of water and that of ice are different

Homework Statement You are given 2.5 102 g of coffee (same specific heat as water) at 70.0°C. In order to cool this to 60.0°C, how much ice (at 0.0°C) must be added? Neglect heat content of the cup and heat exchanges with the surroundings. Homework Equations Q=(m ice)(c ice)(delta T...

Homework Statement A measuring cylinder contains 60cm3 of oil at 0 degrees celsius .When a piece of ice is dropped into the cylinder,it sank completely in oil and the oil level rose to 90 cm3 mark.When the ice melted the oil level came down to 87cm3 mark.The relative density of ice is...

The Problem Hi, I just got this question in a physics class that I am taking, I have been looking at it for about 30 minutes and can't seem to crack it, probably doesn't help that I'm learning it in another language but anyways. A Ice cube of temperature 0 degress Celsius is floating on water...

Homework Statement Given that ice has a specific heat that is half of that of water, does it take more thermal energy to raise the temperature of 5 grams of water or 5 grams of ice by 6 degrees Celsius? Homework Equations Q=mc delta t The Attempt at a Solution So I think it...

Hi, and thanks a million time for reading me! I have to imagine an experiment: An Ice cube (a supposed sentient, living Ice cube) can reform itself by gathering the moisture in the air to increase his size or remain as it is when the temperature makes it melts. -Now I have to prevent the...

Homework Statement If ice floats in water, how many percent of it show above the water level? density of water=1000kg/m^3 density of ice=920kg/m^3Homework Equations I really don't know how to start and what I have to do with those densities...just give me a hint. solution would be 8%

1.) What is the entropy change of a 33.0 g ice cube that melts completely in a bucket of water whose temperature is just above the freezing point of water? (J/deg) 2.) What is the entropy change of a 7.3 g spoonful of water that evaporates completely on a hot plate whose temperature is...

Homework Statement The density of ice is 920kg/m^3, and the density of sea water is 1030kg/m^3. What is the fraction of the total volume of an iceberg that is exposed? given: density sea water = 1030kg/m^3 density ice = 920kg/m^3 Homework Equations density water/density ice...

You bought two kilograms of ice at -10 degrees celcius for your cooler when a friend suggests to instead use two kilograms of wood at -10 degrees celsius. Why should you stick with your ice? Thermal Conductivities Latent Heats Specific Heats Answer with either Good Reason, True but Irrelevant...

Homework Statement An insulated beaker with negligible mass contains liquid water with a mass of 0.275kg and a temperature of 77.7. How much ice at a temperature of -17.4 must be dropped into the water so that the final temperature of the system will be 29.0? Take the specific heat of liquid...

Homework Statement A cube of ice whose edge measures 20.8 mm is floating in a glass of ice-cold water with one of its faces parallel to the water's surface. How far below the water surface is the bottom face of the block? Homework Equations P=F/A, P2-P1=\rhogh The Attempt at a...

Homework Statement A 24.0 kg sample of ice is at 0.00°C. How much heat is needed to melt it? (For water Lf = 334 kJ/kg and Lv = 2257 kJ/kg.) A)5.42*10^4 kJ B)0.00 kJ C)8.02*10^3 kJ D)2.19*10^6 kJ Homework Equations The Attempt at a Solution

[b]1. Two ice skaters, each with mass M = 72.5 kg, both moving with speed V = 9 m/s, approach each other along straight-line parallel paths that are separated by a distance of D = 3.6 m. When directly opposite each other, the skaters grab the ends of a light rod that is the same length as the...

Hot ice solidifies instantaneously when its cold... http://www.youtube.com/v/aC-KOYQsIvU Are there really any oscillations or waves of different states (alternating states) in materials? Perhaps gradient of heat or a bump of pressure spreading? Sound? Electricity?

Homework Statement When water freezes, it expands about 9.10%. What would be the pressure increase inside your automobile engine block if the water in it froze? The bulk modulus of ice is 2.00 multiplied by 10^9 N/m2. Homework Equations Delta P=-B*(Delta V)/V The Attempt at a...

Homework Statement A 49 g ice cube can slide without friction up and down a 31° slope. The ice cube is pressed against a spring at the bottom of the slope, compressing the spring 11.9 cm. The spring constant is 25 N/m. When the ice cube is released, what distance will it travel up the slope...

Increasing glacification creates crustal tension pulling apart the mid ocean trench zones? Decreasing glaciation sucks out the stuffing and wreaks havok with compressive stresses, violent crustal crumpling and dropping of vunerable thin seafloor and mobile landmass plates? Seems a plausible...

Homework Statement Two Identical glasses are filled to the same level. One is filled with fresh water (density=1 gm/cm^3) and the other with salt water (density=1.025g/cm^3) Into each glass a cube of ice (density= 0.92 gm/cm^3) one cm on each side is placed. What is the height of the ice above...

A single 50 g ice cube is dropped into a thermally insulated container holding 200 g of water. The water is initially at 25 oC and the ice is initially at -15 oC. a) What is the final temperature of the system after is has come to thermal equilibrium ? b) In terms of mass, how much of...

Trying to beat the heat of the last summer, a physics student went to the local toy store and purchased a plastic child's swimming pool. Upon returning home, she filled it with 200 liters of water at 25oC. Realizing that the water would probably not be cool enough, she threw ice cubes from her...

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...

Homework Statement Determine the specific latent heat of fusion of ice given the amount of time it takes the ice to melt (150 seconds). Energy is supplied to the ice at 530 W. The sample is .25 kg. Homework Equations Q= ml The Attempt at a Solution (Time * 530W) = .25kg * L 150...

Homework Statement It takes 15 seconds to warm ice 15 degrees ( -15 degrees celsius to 0 degrees celsius). The ice has a mass of .25 kg. The energy is supplied at 530 W to the ice. Homework Equations Q = mc delta T The Attempt at a Solution I plugged in all the information for Q...

A 44 kg girl is standing on a plank that has a mass of 170 kg. The plank, originally at rest, is free to slide on a frozen lake, which is a flat, frictionless supporting surface. The girl begins to walk along the plank at a constant speed of 1.37 m/s relative to the plank. What is her speed...

Homework Statement A 10 kg block of ice has a temperature of -8°C. The pressure is one atmosphere. The block absorbs 4.17 x10^6 J of heat. What is the final temperature of the liquid water? Q=4.17x10^6J T_0=-8 Mass=10kg 4184= specific heat of water 2000=specific heat of ice...

By and large, it has been retreating glaciers, ice shelves and a general reduction in the thickness of ice masses over the last century, and more particularly, the last 25 years, that has alerted the world to the global warming. Is it known by how much, approximately, the worlds store of ice...

Homework Statement If 24g of ice at -5C is added to a isolated dewar containing 50 mL of water at 10C. What would the temperature of the system be at equilibrium if the heat capacity can be ignored and the system is completely isolated. Homework Equations sp ht H2O (l) - 4.18 J/(gC)...

i have no clue where to begin to solve this problem. Can anyone help me out and get me started please and thanks. A hockey puck, sliding on an outdoor rink, has a velocity of 19 m/s forward when it suddenly hits a rough patch of ice that is 5.1 m across. Assume that the coefficient of...

I am currently designing and fabricating an Ice making machine and I would love you to help me come up with ideas to improve the traditional ice making machine. Thanks.

http://www.guardian.co.uk/world/2009/apr/05/ice-shelf-wilkins-antarctic"

I wanted to ask which would provide the largest total BTU cooling regular ice from water or dry ice to reach a temperature of 25 degrees C? 1 lb of Ice would start at -3 degrees C to 25 degrees C at sea level = total BTU 1 lb of Dry ice would start at -80 degrees C to 25 degrees C at sea...

Homework Statement A 1.90 g ice flake is released from the ege of a hemispherical bwon whose radius r is 28.0 cm. The flake bowl contact is frictionless. What is the speed of the flake when it reaches the bottom of the bowl. Homework Equations I took KINETIC ENERGY = GRAVITATIONAL...

OK, I am attempting to calculate the reuirements for creating a 3-ton, 90-day air conditioner using nothing but ice and an exchange loop between that ice and a heat exchanger in my house. I can calculate everything except knowing how much I can practically insulate a storage vessel, and, given...

Is there any software that can easily draw a tetrahedral ice? I was trying to draw a H2O molecule surrounded by other 4 H2O's (forming a tetrahedral ice) by ChemDraw, which seemingly was not very friendly to me.

Homework Statement Water in rock crevices often causes erosion when it freezes, given it expands and exerts pressure on the rock. What is the maximum pressure that water can exert when it freezes? T = 263.15 K dice @ 263.15 K = 0.9 g cm3 dwater @ 263.15 K = 1.0 g cm3 Homework Equations...

I was wondering since when you walk you are pushing backwards, therefore frictions pushes you forwards, so when you fall on ice why do you feet slide forward? Or does that just depend on how you fall? Thanks!

Hi I would like to put up an old post that was put here in 2005 by vexxa. I noticed there was disagreement among the answers given last time and I would really like to know the correct answer because it is bugging me too! Thanks very much. Question: Okay, this is something that's been...