Ice Definition and 963 Threads

A 10kg block of ice slides down a ramp 20m long, inclined at 10 degrees to the horizontal. If the ramp is frictionless, what is the acceleration of the block of ice? Struggling as to where to start, I have the formulae, just don't know how to use them. Most of the questions I've...

http://www.ldeo.columbia.edu/news/2006/07_28_06b.htm :/ Hmmm, interesting. (also, a German report http://www.awi-bremerhaven.de/AWI/Presse/PM/pm06-2.hj/060728Cosmic%20dust-e.html )

http://www.iceagefloodsinstitute.org/ http://www.iceagefloodsinstitute.org/aboutfloods/puzzlesolved.html http://www.sentex.net/~tcc/sgfcrit.html Question and answer with geologist Dr. John Shaw http://www.sentex.net/~tcc/sgfrep.html These articles and many others disclose a...

Hello I was wondering: in which environment ice will be melt faster, air or water? I ahd argue with my friend recently, we needed Ice and he put it in pot with moderately cold water. Since we were outside and temperature was normal, about 17-18 Cel degree I said it will melt faster in water...

Have you ever had PSU Creamery ice cream? The delicate texture is neither too soft nor too hard, but perfect. When your spoon (or tongue) comes into contact with your favorite flavor, the experience is at once wholesome and satisfying, but also teasing. I can't understand how I lived without...

Today I'd like to draw the attention to the end of the last glacial period. Those who have looked at ice core graphs may recall that the Antarctic ice cores appeared to react first around 17,000 years ago and then with a relative mild change in isotope values (interpreted as temperature change)...

Hi I was going to do an experiment on Ice Cream (Project) However.. I can't seem to find valuable data off the internet. What I'm looking for is, what an Ice Cream is chemically made up off, the bonds in an ice cream, the forces between bonds etc and whether there are certain experiments I can...

A 3.8 kg block of copper at a temperature of 72C is dropped into a bucket containing a mixture of ice and water whose total mass is 1.2 kg. when thermal equilibrium is reached, the temperature of the water is 8C. How much ice was in the bucket before the copper block was placed in it? (Neglect...

When you make ice cream using a couple of zip loc bags and a salt/ice mixture do the room and surroundings have any effect? Can you be in a warm room and still make the ice cream? Thanks.

Hello there, I am unsure about the following question and would like some help to understand please! :smile: Consider the following systems: a) a container that is half filled with alcohol, stoppered and allowed to stand for several days b) crystals of KMnO4 that are dissolved in water...

Sir, Ice starts forming in a lake at 0 degree Celsius, when the atmospheric temperature is -10 degree Celsius. If the time taken for 1 cm of ice to be formed is 7 hrs, what is the time taken for the thickness of ice change from 1 cm to 2cm? Can you please give a hint to solve this problem?

http://www.sfgate.com/cgi-bin/article.cgi?file=/c/a/2006/04/15/MNGN5I9OUE1.DTL

Hey. I wasnt sure where to post this, since it isn't an actual question i need to complete for school, but it relates to it. When my year 11 physics class was solving the final temperature of an ice/steam mixture, my teacher kept talking about how energy is transferred too AND from the ice...

I need a kick start for the following question. We're studying open/closed systems at the moment. "450kg of ice at -18 degrees C is to be removed from a freezer using a jet of steam. How much dry steam at 100 degrees C is required if the final temp of the effluent is 5 degrees C?" This is...

Ok, I am having some trouble with this problem: How much energy does it take to convert .500 kg ice at -20C to steam at 250 C? Specific heat capacities: ice: 2.1 j/g C, liquid: 4.2 j/g C, steam: 2.0 j/g C. Hvap = 40.7 kj/mol, and Hfus = 6.02 Kj/mol. What I have done so far is use q=mst...

This is probably a stupid question, and I realized the answer before, and I know my professor explained this in class, but why does voltage lead current for inductors and current lead voltage for capacitors. I don't want a physical explanation but a mathematical one. I am looking at my...

Given: latent heat of fusion of water is 333000 J/kg. A 3.37 g lead bullet at 27 degrees C is fired at a speed of 272 m/s into a large block of ice at 0 degrees C, in which it embeds itself. What quantity of ice melts? Assume the specific heat of lead is 128 J/kg x C. Answer in units of g...

When ice is @ eqilibrium with water, the pressure is increased, what happens to the eqilibrium?

1. When the ice cube melts, will the water level rise, stay the same or fall? and why? 2. What happens to the height of pond when ancor thrown overboard rise, stay same or fall? Why? I know that for the first question it's stay the same and for the 2nd question, it's fall; but i don't know...

Colligative property of ice cream HELP! How is the colligative property in effect during the manufacture of ice cream, and in the ice cream??

A new step towards Ice Age Park has been made: What more does it take to clone a Mammoth?

q.if two copper vessels of mass 20g and 50g are heated to 85 degrees celcius and are put onto similar ice blocks, what is the ratio between the depths they will sink into the ice?

"January 2005 Ice Storm in Geneva" http://www.pbase.com/scherrer/s2_january_2005_ice_storm Nature can be both beautiful and damaging.

Liquid Nitrogen and Dry Ice Hi I am doing an experiment for my chemistry independent project which is on doing super conductors, well i am doing one wherre you take YBa2Cu3O7 - the so-called "1-2-3" superconductor and put it in liquid nitrogen and it makes a rare Earth magnet levitate above it...

what mass of steam at 100 c must be added to 1.ookg of ice to yeild liquid water 20c ? this is what I have so for c*m* displacement of temperature =m *L

How much ice could be melted by 320. grams of water at 68.0 degrees C? Would I us mL + mcT=0 for the equation, and do the latent heat of ice for the first part and water for the second?

Question: The heat of vaporization of water is 2260 J/g at 100°C. A 100.0 g sample of water condenses and all of the heat liberated is then transferred to a block of ice. How many grams of ice will melt? Assume the condensed water remains at 100°C and the melted ice remains at 0°C. The heat...

Can anyone help to explain what vapor pressure does...i know what it is...but how can it be used if you put a cube of ice at 0 degrees C, in a vacumed container (amospheric pressue equals zero) won't the ice all go to gas, since its vapor pressure is greater than the atmospheric pressure...

http://news.yahoo.com/s/ap/20051125/ap_on_sc/greenhouse_gas http://www.abc.net.au/science/news/stories/s1516607.htm http://www.newscientist.com/article.ns?id=dn8369&print=true

Ya know... I am getting sick of not having a refrigerator with an automatic ice maker. I hate having to wait like half a day because no one bothers to refill the ice trays. This brings me to my question. Is there a way to make ice much quicker in those trays? I don't know of any way to...

Entropy - Help! Water --> Ice Here is my question: 10 kg of h2o at 20 degrees C is converted to Ice at -10 degrees C by being put in contact with a reservoir at -10 degrees C. The process takes place at constant pressure. The heat capacities at constant pressure of water (Cp_h2o) and Ice...

If they melted and water was evenly distributed all over the earth. From what I guess I should use angular momentum. Ang momentum = I (moment of intertia) X W (angular velocity) I = mr^2 for a thin hoop...I think I use this for the ice caps and I for a uniform sphere is 2/5mr^2 so...

Hi all, i am currently studying for an exam, and so i am going over the questions in last years exam. Unfortunately we were not given the answers, so i am not sure whether i am getting the questions right. If its not too much trouble, and someone has a bit of time to spare, could they verify...

Hi, I encountered this problem while I was studying for a Physics test, and this is how far I got, hopefully someone can point me in the RIIGHT direction. The proof goes like this, a guy is sitting on the top of an ice hemisphere, and someone pushes him off, and so he slides down the...

http://www.abc.net.au/science/news/stories/s1485573.htm

When researching the climate during the ice ages (Pleistocene) large isotope jumps were discovered in the ice cores , and obviously they were tied to the supposed large temperature changes. This was quite logical since those spikes seem to be co-dated with ice age transitions to moderate...

During one hot summer, a physics grad student went to the local toy store and purchased a plastic child's swimming pool. Upon returning home, he filled it with 200 liters of water at 25 C. Realizing that the water would probably not be cool enough, he threw ice cubes from his refrigerator, each...

If we could determine how much ice is melting in the polar caps we could find out how many powerstations it would take to refreeze the ice.

http://www.lsbu.ac.uk/water/amorph.html puts the densities of various forms of amorphous ice at densities that are very low. g/cm-3 in fact. Is this a typographical error? If not why is it so dense? Crystalline ice's densities are attributed to all the empty space in-between crystals, amorphous...

A 36 kg block of ice slides down a frictionless incline 1.2 m long and 0.48 m high. A worker pushes up against the ice, parallel to the incline, so that the block slides down at constant speed. (a) Find the magnitude of the force exerted by the worker. (b) Find the work done on the block by...

Let supply and demand functions for butter pecan ice cream given by p=S(q)= 2/5q and p=D(q)=100 - 2/5q where p is the price in dollars and q is the number of 10-gallon tubs. Find the equilibrium quantity and the equilibrium price. do i just set them equal to each other?? 2/5q=100-2/5q...

Oh hello This's just strange. We did a small project "Making ice-cream" You know, put milk and sugar and vanilla into a zimploc, place the pack into a bigger one stuffed with ice and salt. We've luckily gone through the questions he asked. But the last question just doesn't make sense to me...

A 58.0 kg ice-skater moving at 6.25 m/s glides to a stop. Assuming the ice is at 0°C and that 53.5 percent of the heat generated by friction is absorbed by the ice, how much ice melts? Should I first calculate the work? I know I need to use Delta U= Q-W...but what is Delta U in this case?

Not long ago I read an article here in PF about explosion of dry ice in a bottle and I just accidentally found one of the video... If you are interested, u might want to check it out: http://www.spikedhumor.com/Article.aspx?id=360 Another physics experiment performed on water balloon...

I havn't seen this posted here, but its a nice picture of ice on mars. http://www.esa.int/SPECIALS/Mars_Express/SEMGKA808BE_0.html Is this the result of a comet hitting Mars and depositing the ice?

when you walk the reaction of your thrust is the Earth going very slightly in the other sense but how can an ice skater that having the skates perfectly parallel while thrusting pushes sidewards and advances forward besides taking into account that being the skates parallel the longitudinal...

Some help with this question please? a) An ice cube floats in a glass of water. When the ice melts, will the water level in the glass rise, fall, or remain unchanged? Justify your answer. b) If the ice had been made from pure water, and the water in the glass was salt water (denser than...

I just found this on the web and thought i`d share... As we all know, it takes 1 calorie to heat 1 gram of water 1 degree centigrade. Translated into meaningful terms, this means that if you eat a very cold dessert (generally consisting of water in large part), the natural processes which...

If Ice Age suddenly come back, What will people do?

Okay, this is something that's been bugging me for a long time, and I should have asked my physics teacher this past year way back when we were discussing mechanics, but I never could remember to do it. Let's say I have an identical twin, and we're both on a big frozen pond, standing still...