Ice Definition and 980 Threads

Calculate the minimum work required to manufacture 3.0kg of ice cubes from water initially at 0C. Assume that the surroundings are at 30C. The latent heat of fusion of water at 0C is 338.7kJ/kg. My working: e=1-\frac{273}{303} then e=\frac{work}{input} input=(3.0)(338.7E3) work=100.6kJ...

Ice surfing! Hi, this is the problem: A small boy places a plank of wood on a frozen pond and then, taking a run up, jumps onto one end of the plank. If the plank is perpendicular to the boys trajectory and there is no friction between the plank and the ice, How will the plank move after the...

Converging lens made of ice Would it be possible to start a fire by shaping a piece of ice ? That's the question. I'm thinking that yes it would be possible if you shaped the ice in the form of a converging lens. Even though the lens is made of ice, the sun rays would not burn through it...

I'm kinda having trouble with this problem. can n e one help me out? Two ice skaters undergo a collision, after which their arms are intertwined and they have a common velocity of 0.85 m/s [27° S of E]. Before the collision, one skater of mass 71 kg had a velocity of 2.3 m/s [12° N of E]...

So, first day of school today, and I'm in honors chemistry. I got a packet with refernce tables etc. and a homework assignment designed just to get you to use the tables and be able to connect one thing they say with another. Anyway, one question is "How much heat is required to melt 1g of ice?"...

I'm sure that if I can figure one of these out, then I will be able to understand how to compute all this buoyancy stuff. Anyways, here is is: What is the smallest area of a chunk of ice that is 1ft thick that will just support a 3000lb car.

You know the hot weather we have here in Spain. So we have to use ice cubes when we drink water usually in summer in order to refresh a little ourselves. I would never recommend you to come here in summer if you are not an enemy. Well, some day I was pouring an ice cube (it almost had no...

Hi everybody, I recently took a piece of meat from the freezer and put it in the microwave in order to defrost it. Then I realized that this actually shouldn't work. I don't see how you can heat ice in a microwave. So how does this work? I've tried it on ice cream (don't repeat that...

http://news.bbc.co.uk/2/hi/science/nature/3792209.stm

How do i determine this, in J/kg, without the use of any calorimeteres? Keep it simple please Thanks :biggrin:

Hey, can anyone describe to me an experiment to find the specific heat capacity of ice? Keep it simple please :smile: Thanks in advance :wink:

http://www.newscientist.com/news/news.jsp?id=ns99994888

If I melt dry ice, can I swim without getting wet? I'm just curious: What makes dry ice dry?

I have heard this argument all my life. Some say put hot water in an ice tray and it will freeze quicker than cool water. I don't follow the logic to that way of thinking. Do you? What is the right answer?

snow can be compressed into ice. what is the limit to how solid ice can be? could it be made dence enough to be used as a workable sword?

Which is your favorite Treat?

A 1.0 g lead bullet at 33°C is fired at a speed of 250 m/s into a large block of ice at 0°C, in which it becomes embedded. What quantity of ice melts? Heres what I have: From ΔQ = mcΔT, mA = dQ/[c(dT)] And from ΔQA = -ΔQB ... Further cogitations are in...

for my science fair project, i need to know the properties of an ice cube (physical and chemical). I am trying to see if the madd/weight of an ice cube effects its "flicking" distance. don't ask. :) please help!

Ok, so you've got a glass of water with some ice (the ice is floating). After the ice melts, does the water's surface level a) rise? b) lower? c) stay the same? (and why?)

after anuclear war as most know a nuclear winter will ensue. many people don't know however most dot know that this will cause a snowball Earth with the entire planets surface covered in snow and until another million or so years the atmospheres gasses won't trap enough heat to melt the snow but...

stuck in explaining this problem A glass of water contains a large ice cube the glass can hold no morw water the ice is floating in the water what will happen to the water level when the ice melts?

The question is "8 grams of water at 100 degrees C are poured into a cavity in a very large block of ice initially at 0 degrees C. How many g of ice melt before thermal equilibrium is attained round off to the nearest whole number?" As I understnd it I need to: (heat to change ice to...

An ice skater doing a toe spin with outstretched arms has an angular velocity of 4 rad/s. She then tucks in her arms, decreasing her moment of inertia by 7.5% a. What is the resulting angular velocity? b. By what factor does the skater's kinetic energy change? For a, I use IW = I'W' >>...

I am fairly new to chemistry, so this might seem like a stupid question, but I am still interested nonetheless. A burbon on the rocks exists because ice is less dense than water, but how can this be the case when the molecules in a solid are closer together?

http://www.cnn.com/2003/TECH/science/09/22/arctic.ice.reut/index.html

Hey all, I got this e-mail forwarded to me, and I wondered if any of you had seen it yet. I'm scepticle as to the claims within, because it sounds like an urban legend. What do all of you think? This was sent to me buy the man in the Bat Cave. [name deleted out of courtesy] We thought is...

Dry ice forms at -109.6oF. The record low natural temperature measured on Earth (Antarctica) was approximately -129oF. Does the solidification of carbon dioxide mediate temperature there, either by heat of sublimation or reduction of greenhouse effect? Would long-term global climate be...

http://news.yahoo.com/news?tmpl=story2&u=/030822/161/51k7p.html&e=1&ncid=832

"Unusual warm spots on Mars might represent "ice towers" similar to those seen in Antarctica, say researchers. They could even harbour life, Nick Hoffman of Melbourne University told a conference on Thursday." http://www.newscientist.com/news/news.jsp?id=ns99993986

Are we in the middle on an ice age now? I do not think that we are but my friend does.