Ice Definition and 963 Threads

Hello, I've encountered some problems while doing a mechanics project, and was hoping for some help here. The problem is what follows: An icecube starts to move at the top of a half spherical building (start velocity 0, no friction, and can be regarded as a particle). What's the icecube's...

I've heard that if the ice caps melt the oceans will rise. but i thought that water expands when freezing. is this a myth?

A 2.65g aluminum bullet at 31.4°C is fired at a speed of 209 m/s into a large block of ice at 0°C, in which it embeds itself. What quantity of ice melts? Q=(9.00E2)(.00265)(31.4)=74.889J 74.889J=m(33.5E4)=2.23E-4kg so i get a final answer of 2.23E-4kg but its wrong. i think I am either...

How much heat is required to change a 46.6 g ice cube from ice at -12.5°C to water at 53°C? (if necessary, use cice=2090 J/kg°C and csteam= 2010 J/kg°C) then i used Q=cmt and Q=mL Q=(2090)(.0466)(12.5)=1217.425J Q=(.0466)(33.5E4)=15611J Q=(2010)(.0466)(53)=4964.298J then when i add...

:confused: PROBLEM: A cone with a 30degree angle and a hieght of 1 must fit a sphere of icecream in it with a maximum volume. what is that volume, and what percentage of the sphere is in that cone!? PLEASE HELP!? this is all i have R= (h-a)(sin15) a=distance between center of sphere...

What are your thoughts? Do you think there is any there? Have we already contaminated it by drilling through the ice?

Homework Statement Find the volume of the smallest block of ice which when floating on salt water will carry a person of mass 80 Kg Densities: Salt Water = 1025 Ice = 917 Homework Equations F_b=P_f * V_f * G The Attempt at a Solution I figured F_b would have to be equal...

Homework Statement Consider a gravity free hall in which a tray of mass M,carrying a cubical ice block of mass m and edge L,is at rest in the middle.If the ice melts,what would be the displacement of the system? Homework Equations The Attempt at a Solution I think it has to do...

source:british physics olympiad :cool: a beaker of water has a piece of ice floating on its surface.When the ice melts,show that (by logic or by equations) 1.that the water level remains unchanged. 2.If a coin was initially kept above the ice block what chang will be there in answer to 1...

hello i want to make a number of ice glasses and i need to make them clear and bubble free. i know that you can make clear ice if the water is circulating in the container as it freezes but due the number of glasses i need to make this method is not possible. i did think about doing a couple of...

Hi everyone, I am new to this forum. I am taking an undergraduate thermodynamics course and got stumped by this problem. I found this forum and figured that someone here would be able to help me with this! :-p Homework Statement Develop a model for melting of an ice cube. What assumptions...

While standing on frctionless ice, you (mass 65.0 kg) toss a 4.5 kg rock with initial speed 12.0 m/s. IF the rock is 15.2 m from you when it lands, (a) at what angle did you toss it? (b) How fast are you moving? I'm still having trouble with these.

There is recent research that supports the assertion that the start of an ice age epoch is initiated by an increase in Galactic Cosmic Rays (GCR) and that the ice age glacial/interglacial cycle is controlled by processes that periodically modulate the amount of GCR that penetrates the solar...

Homework Statement .15 kg of steam at 100 degree Celcius is mixed with .2kg of water at 50 degree and .2 kg of ice at 0 degree. Determine the final temperature and phase(s) of the final state. Assume that no energy is lost to the surroundings. Homework Equations The Attempt at a...

How would you estimate the charge density (air actually entering the cylinder) in an ICE? Assume the outside is standard pressure and temperature of 15*C (60* F) and 101.3kPa (14.7psi). At high airflow speeds (Wide Open Throttle), pressure in the manifold should approximate atmospheric...

1. Homework Statement This is all that is given. How much ice must melt at 0 deg. C to gain 6 g of mass? 2. Homework Equations I don't know any Relevant equations to this problem. 3. The Attempt at a Solution I have tried leaving mass as a variable and using Latent Heat...

Homework Statement This is all that is given. How much ice must melt at 0 deg. C to gain 6 g of mass? Homework Equations I don't know any Relevant equations to this problem. The Attempt at a Solution I have tried leaving mass as a variable and using Latent Heat Energys too. I...

Homework Statement How much ice must melt at 0 deg. C to gain 5 g of mass? Latent Heat of Fusion = Homework Equations I cannot seem to find many equations that relate thermodynamics and mass, maybe that is my biggest problem... The only one i could find was Q=Lm The Attempt at a...

Homework Statement An insulated Thermos contains 110 cm3 of hot coffee at 87.0°C. You put in a 15.0 g ice cube at its melting point to cool the coffee. By how many degrees (in Celsius) has your coffee cooled once the ice has melted? Treat the coffee as though it were pure water and neglect...

What I am getting at is I would like to find out the psi of some engines. Is there a formula(s) to get good estimates or exactness of the pressure made in a cylinder. For example, you would need the cubic inch, static compression, cam specs, etc...and at a given position of the piston get...

Given: cp, ice = 2090 J/ kg . Celsius cp, water = 4186 J/ kg . Celsius cp, steam = 2010 J/ kg . Celsius Lf = 3.33 x 10 ^5 J/ kg Lf = 2.26 x 10 ^6 J/ kg How much energy is required to change a 38g ice cube from ice at -13 degrees C to steam at 113 degrees C? Answer in units of J. I...

I have a question involving putting an ice cube in a thermos of coffee. I used c_{ice}m_{ice}(T_f-T_i) + c_{coffee}m_{coffee}(T_f-T_i)=0. Is this right? If so wouldn't the temperatures of the ice remain constant until it is all gone?It says that the ice is at 0'C.

Intro Thermodynamics--put ice in water Homework Statement (a) Two 45 g ice cubes are dropped into 290 g of water in a thermally insulated container. If the water is initially at 25°C, and the ice comes directly from a freezer at -15°C, what is the final temperature at thermal equilibtrium...

I have read on the faq section of the google physics group that sometimes ice re-freezes faster after hotter water is added to it.How can this happen - surely something hotter takes longer to cool down?

Here you can see how the Greenland isotope proxies in the ice core records have been studied very carefully on temperature sensitivity: http://www.ipsl.jussieu.fr/GLACIO/hoffmann/Texts/jouzelJGR1997.pdf The result is figure 4 (pag 7) where the temperature variation is derived from a...

The European Renaissance concurs with the transition in climate from the Medieval Warm Period to the Little Ice Age. A long list of famous winter painters is headed by Pieter Brueg(h)el the elder, showing a harsh climate, which nontheless did not seem to affect the further development of the...

http://www.icemarathon.com/ I fully expect that one of our PF runners will step up to the cube.

Homework Statement How many grams of aluminum at 90 C would have to be dropped into a hole in a block of ice at 0 C to melt 20 g of ice. Homework Equations Q = mcdelta T and Q = mLf c(H2O) = 1 cal/g.C c(Al) = 0.215 cal/g.C The Attempt at a Solution I can find the heat of fusion Q...

Homework Statement A 35 g ice cube at 0.0°C is added to 110 g of water in a 62 g iron cup. The cup and the water have an initial temperature of 36°C. Find the equilibrium temperature of the cup and its contents. Homework Equations heat lost by water+cup...

I have heard that when ice mixes completely with water then the Ice will be completely melted and the temperature of the water willl actually be below 0 C, is this true?

Homework Statement Occasionally, huge icebergs are found floating on the ocean's currents. Suppose one such iceberg is 149 km long, 27.7 km wide, and 152 m thick. (a) How much heat in joules would be required to melt this iceberg (assumed to be at 0 °C) into liquid water at 0 °C? The density...

Homework Statement How much energy is necessary to completely melt an ice cube of mass 360.6grams that is initially at a temp of -25.2 degrees celsius. Homework Equations im thinkin i should use specific heat equation? is that right? c=Q/m(change of temp) 2090=Q/.36069(25.2) The...

Well I have always been interested in engines and how to make them more efficient and make more power. Particularly the popular modifying of Ford and GM engines (302ci, 351ci, 350ci, etc.). I am looking for a book that could help me understand how a cam actually works, and what to tweak...

A 55 g ice cube at 0°C is heated until 40 g has become water at 100°C and 15 g has become steam at 100°C. How much energy was added to accomplish the transformation? I tried using Q=mL for each change and adding them together. Q=.055(3.33x10^5) Q=18315 then Q=.015(2.26x10^6)...

Homework Statement A 600- kg ice boat moves on runners on essentially frictionless ice. A steady wind blows, applying a constant force to the sail. At the end of an 7- s run, the acceleration is 0.4 m/s2. What was the acceleration at the beginning of the run? Answer: 0.4m/s What was the...

so there're: 0.041 kg ice cube at 0.0 *C 0.110 kg water at 40.0 *C in 0.062 kg iron cup at 40.0 *C Find the equilibrium temperature of the cup and its contents: ------- So what I tried doing was... I found the heat lost by water if cooled to 0 *C, which was 18418.4 J (mass of water *...

can someone explain to me how sundogs form? I know it has to do with refraction of light through ice crystals but i need a good ray diagram explaining this...

Two 60 g ice cubes are dropped into 270 g of water in a thermally insulated container. If the water is initially at 25°C, and the ice comes directly from a freezer at -15°C What is the final temperature if only one ice cube is used? I have no idea where to begin...my teacher didn't give us...

I have done some calculations so far but i am kind of stuck, here is the problem: A jar of tea is placed in sunlight until it reaches an equilibrium temp of 32.4 deg C. In an attempt to cool the liquid, which has a mass of 185g, 113g of ice at 0degC is added. Assume specific heat capacity of...

Here is a two part problem I'm having trouble with: The length of the column of mercury in a thermometer is 4cm when the thermometer is immersed in ice water and 23.5cm when the thermometer is immersed in boiled water. a) What should be the length at room temperature 22degreesCelcius? I...

Find the location of the CM of a hollow ice cream cone, with base radius R and height h, and uniform mass denisty. How does your answer change if the cone is solid, instead of hollow? Okay, so I'm pretty sure that I need to work with slices, and that you need the mass which I believe is...

A 2.0 kg bag of ice is used to keep a cooler of pop cold for 5.5 h. If the ice had an initial temperature of -4ºC and, after 5h, was liquid water with a temperature of 3ºC, find the power of energy absorption. Any help would be great. I don't know where to start:confused:.

Small ice cubes, each of mass 5.30 g, slide down a frictionless ski-jump track in a steady stream, as shown in Figure P6.71. Starting from rest, each cube moves down through a net vertical distance of y = 1.40 m and leaves the bottom end of the track at an angle of 40.0° above the horizontal. At...

A 4.00kg block of ice is removed from a freezer where its temperature was maintained at -20C. Find the heat that the ice must absorb in order to warm up to its melting point, melt, and then the water warms up to 10.0 degrees. The specific heat capacity of ice = 2000J/kg-degrees C, the specific...

A person is standing on a sheet of ice so slippery that friction may be ignored. This individual fires a gun parallel to the ground. When a standard cartridge is used , a 17-g bullet is shot forward with a speed of 250 m/s, and the person recoils with a speed of vc. When a blank cartridge is...

Whar happens to the level of water when ice melts in a beaker

For eg Boeing 777 , there's only anti ice feature on mid span of wing only, while wing root and tip area are not. Anyone know the reason why wing tip and root are less likely to form ice?

I sincerely apologize for the broad and generic nature of my question, but I hope someone will be able to give me some guidance. I'm looking to learn more about the melting of ice, more specifically about the influence of a rise in temperature and the influence of light (most likely just...

http://www.eurekalert.org/pub_releases/2006-08/osu-sro082106.php

http://www.utexas.edu/opa/news/2006/08/engineering10.html ''Science (DOI:10.1126/science.1129007)'' http://www.newscientist.com/data/images/ns/cms/dn9717/dn9717-1_464.jpg I like this one. Well, I like maps. I found it interesting in Northern Canada readings show +5.