Ice Definition and 980 Threads

Homework Statement A 0.530 kg sample of liquid water and a sample of ice are placed in a thermally insulated container. The container also contains a device that transfers energy as heat from the liquid water to the ice at a constant rate P, until thermal equilibrium is reached. The...

This question involves a bit of background, so please be patient. I understand that the heat absorbed by ice's phase change from solid to liquid is much greater than the amount that results from the difference in temperature of the ice and the ice cream batter. So the primary cooling effect is...

I have seen this experiment with cooling down a beer: My question is why is cooling so effective? I was thinking about it and my guess is: Salt breaks down a bond in ice crystals, but this reaction needs energy. It took a energy from environment and all around is cooled down. Are my ideas fine?

Homework Statement An ice cube at the melting temperature that has a mass of 20 g, is struck by a bullet with a mass of 9 g, flying at a certain speed. Determine the speed of the bullet, if it is known that one third of his energy was consumed to break the ice, and the remainder to melt it...

Homework Statement 300gm of water at 25°C is added to 100gm of ice at 0°C ,find the final temperature of the mixture .Also find the final composition of mixture . Homework Equations [/B] Specific heat of water = 1 cal/gm/°C Latent heat of fusion of ice = 80 cal/gm The Attempt at a Solution...

Homework Statement 1Kg ice at -10° C is mixed with 1 Kg water at 100°C .Then find equilibrium temperature. Homework Equations Specific heat of water = 1Cal/g/°C Specific heat of ice = 0.5 Cal/g/°C Latent heat of fusion of ice = 80 Cal/g The Attempt at a Solution [/B] Heat required by ice...

Homework Statement Vapors of 100 C is added to an ice cube of 0 C. How much of the ice cube has melted and what's the final temperature if the masses of the steam and the ice cube are 10.0 g & 50.0 g respectively? Homework Equations Lw = 3.33 x 105 J/kg cw = 4186 J/kg*C Q = m*c*ΔΤ Q =...

Homework Statement [/B] A hockey puck travels across the ice at 6.5m/s. the puck travels a total of 7.6m. What is the coefficient of friction between the puck and the ice. Homework Equations [/B] fnet=ma Ffr= coefficient of friction x force normal The Attempt at a Solution [/B] I found my...

Aside from vacuum flasks and vacuum insulated panels, there doesn't seem much else vacuum insulated. Why are there no ice chests vacuum insulated? My uneducated guesses as to why ice chests are not vacuum insulated: 1. Cost to vacuum insulate. 2. The cylindrical shape of a flask offers...

The density of ice is 920 kg/m3. Now let's calculate. m = 269 000 000 000 000 kg p = 920 kg/m3 ----------------------------- v=? V=m/p V=269 000 000 000 000 kg / 920 kg/m3 V = 292 391 304 347 m3 = 292 391 304.347 km3 v > 269 km3 *NOTE* I made a mistake in the title. I meant to write 269 km3...

Homework Statement An ice cube of mass 0.01.kg at a temperature of 0 degrees Celsius is dropped into a cup containing 0.10kg of water at a temperature of 15 degrees Celsius. What is the max estimated change in temperature of the contents of the cup? SHC of water = 4200J per kg per kelvin...

Is the answer in my physics book wrong or did I miss something? Homework Statement A vessel whose walls are thermally insulated contains 2.40 kg of water and 0.450 kg of ice, all at 0.0°C. The outlet of a tube leading from a boiler in which water is boiling at atmospheric pressure is inserted...

Many of the commercial and larger restaurant ice makers require that water temp pumped in for making ice needs to be 45F or higher. Anybody know why? Seemed like the colder the better, this side of freezing, everything would run more efficiently. I'm guessing it's cause however it's piped...

Homework Statement https://moodle.telt.unsw.edu.au/pluginfile.php/2296810/question/questiontext/2691158/6/1668509/cart%20track.png A block of ice (that we shall treat as a particle) slides with negligible friction or air resistance on the curved tpath sketched (black line). The mass of the...

1. Homework Statement A rod (m=6kg, L=3m) at rest on ice (μ=0) is struck by a piece of clay (m=1kg, V=5m/s). The clay sticks. 1) What is the Velocity of the center of mass after the collision? 2) What is the Angular Velocity of the rod following the collision? If the clay did not stick but...

Should it be on the farside to get radio silence for radio telescopes and explore there, or should it be at the pole for the ice, or in a cave?

Homework Statement Given a copper calorimeter that has a mass of 446 grams containing 95 grams of ice at 0.0°C. If 35 grams of steam at 100.0°C and 1.00 atm pressure is added to the can, what is the final temperature of the can and its contents? At the final temperature, how many kilograms are...

A Milankovitch cycle is defined in Universe Today as "a cyclical movement related to the Earth’s orbit around the Sun." There are three elements to a Milankovitch cycle that affects the amount of solar heat and with it, the Earth's climate: Eccentricity (Orbital Shape)--The elliptical shape...

http://en.wikipedia.org/wiki/Lunar_lava_tube Given that they are expected to be at about -20C and parts of them will be in permanent darkness. If ice can exist at the Lunar poles: http://nssdc.gsfc.nasa.gov/planetary/ice/ice_moon.html then why not there? If water molecules migrate from the...

I have solved the question below and was wondering someone can have a look at it and give some feedback, please. Homework Statement An object is pushed from rest across a sheet of ice, accelerating at 5.0 m/s2 over a distance of 80.0 cm. The object then slides with a constant speed for 4.0 s...

Homework Statement The problem is that a Carnot contains Boiling water in the hot reservoir and ice water in the cold reservoir. Given that 0.0400kg of ice is melted in 5 minutes, what is the amount of work done by the engine. Homework Equations Qh/Qc=Th/Tc W=Qh-Qc W=(1-Tc/Th)Qs q=mHf...

Why does ice piece sticks on hand but not wood piece?

1. The problem: A hockey puck is hit on a frozen lake and starts moving with a speed of 11.6 m/s. Five seconds later, its speed is 7.4 m/s. What is its average acceleration? The acceleration of gravity is 9.8 m/s. Answer in units of m/s. What is the average value of the coefficient of kinetic...

Homework Statement "In a container of negligible mass, equal amounts (in weight) of ice at 0◦C and steam at 100◦C are mixed at the atmospheric pressure. Assuming no heat exchange with the surroundings, what is the temperature when the system reaches equilibrium? What are the fractions of...

Homework Statement "A well-insulated bucket of negligible heat capacity contains 120 g of ice at 0°C. If 20 g of steam at 100°C is injected into the bucket, what is the final equilibrium temperature of the system?" Homework Equations $$Q_{fus} = m_{water}L_{fus}$$ $$Q_{vap} =...

Homework Statement The following chart shows the temperature before and after Melting Ice. (A, B) have the same amount of water. If the heat required to fuse both cube are equal. The ratio between the two cubes mass: Cup Before After A 25 21 B 25 23...

When driving on snow and ice does engine braking (by downshifting) provide more traction than applying brakes in a slow and controlled manner?

Hi, I have read that the Earth has undergone five ice ages, the latest one is the Quaternary glaciations. I know that in the ice age there are glacial periods and interglacial periods, and we are currently in an interglacial, I want to make sense what is the effect of those succsessive periods...

So I've heard that increasing pressure in water would make the molecules more compact and then eventually become a solid. So it's possible to have hot ice. But isn't it also true that as pressure increases, the temperature increases as well. For example, if I increase the force per volume, the...

Homework Statement A big ice cube is placed in a small glass of water. The level of water in the glass is marked. When the ice cube melts completely,the overall water level will remain the same. Explain. Homework Equations Upthrust= weight of fluid displaced The Attempt at a Solution Since...

Homework Statement Homework Equations $$mgh = \frac{1}{2}v^2$$ The Attempt at a Solution [/B] I'm working on a). I tried using conservation of energy to get v. $$mg(c+b) = \frac{1}{2}v^2$$ $$v = \sqrt{2g(c+b)}$$ After this I'm stuck. In order to get distance from knowing the velocity...

Homework Statement Initially you have mW = 4.6 kg of water at TW = 74°C in an insulated container. You add ice at TI = -19°C to the container and the mix reaches a final, equilibrium temperature of Tf = 33°C. The specific heats of ice and water are cI = 2.10×103 J/(kg⋅°C) and cW = 4.19×103...

Homework Statement Two ice skaters of mass ##m = 50\,\mathrm{kg}## each are moving towards each other frictionless on parallel paths with a distance of ##3\,\mathrm{m}##. They both have a velocity of ##v_o=10\,\frac{\mathrm m}{\mathrm s}##. Skater 1 is holding a massless rod of length...

NASA report. ~10,000 cubic kilometers, more than even the most enthusiastic colony concepts could use in the whole 21st century, and even if we don't take recycling into account at all. The ground has 50-85% water ice, buried under a 1 to 10 meter surface layer of regolith - it should be easy...

Homework Statement Soda from a ms=12 oz can at temperature Ts=13 degrees C is poured in its entirety into a glass containing a mass mI=0.16kg amount of ice at temperature TI=-19.5 degrees C. Assume that ice and water have the following specfic heats c1=2090 J/(kg*C) and cs= 4186 J/(kg*C), and...

As far as I know, ice skating works because high pressure lowers ice melting point. A thin layer of water forms between the blades and the ice which greatly reduces the friction. Just now, I am reading a thermodynamic book. For the phase boundary between ice and water, dP/dT ~ 135bar/K...

What are the thermal properties of ice cream? any helpful journals or pdfs for this kind of study? thank you ☺

Homework Statement [/B] An ice skater executes a spin about a vertical axis with her feet on a frictionless ice surface. In each hand she holds a small 5kg mass of which are both 1m from the rotation axis and the angular velocity of the skater is 10rad/s. The skater then moves her arms so that...

Hello! I am just stuck on one part of this question and would be grateful for any help. Question A small block of ice slides from rest from the top of an inverted frictionless bowl of radius R (above right). How far below the top x does the ice lose contact with the bowl? Equations mgx =...

Homework Statement A 1x106 kg piece of ice is placed into a lake. How much heat is taken from the lake to raise the temperature of the ice from 0 °C to 1x10-20 °C? How much volume does the lake increase by? Latent heat for water is 334x103 J/kg Homework Equations Found in my textbook, cice =...

Homework Statement In an insulated vessel, 265 g of ice at 0°C is added to 630 g of water at 17.0°C. (Assume the latent heat of fusion of the water is 3.33 105 J/kg and the specific heat is 4 186 J/kg · °C.) a) What is the final temperature of the system? b) is already solved Homework...

Ice melting in a box has the water coming off it at a temp just above freezing until all the ice is gone. Are all phase change materials pretty much the same, with their immediate containment container exterior staying pretty much just above their phase change temp until all the PCM inside has...

Why do we slip when we try to walk on ice? I know that it's because the friction is small. But, I still don't get it. The kinetic friction or static friction? Is the friction force direction opposite or same direction as the walk? I don't get it. Please help

The article below is tainted with the silliness of woo, but the phenomenon is quite natural - and way cool. It's a tropical verson of an ice circle. I found ice circles hard to believe at first, but I watched a small-scale simulation on an artificial river with just the right flow rate and...

The price of a tub of ice cream and a tub of yoghurt respectively at store A and store B are given below. Store A ( 40 , 30) Store B ( 38 , 35) (i) Represent the above information in a matrix of order 2 * 2, such that the columns denote the stores. (ii) 20 tubs of ice cream and 30...

Hey! :o An ice cream shop has $m$ kinds of ice creams $s_1, \dots , s_m$. On the card there are $n$ cups $b_1, \dots , b_n$. Each cup contains some of the ice cream kinds. The budget of Gina suffices for $k$ cups. Gina wants to choose $k$ cups so that each of the $m$ ice cream kinds are...

I came up with a basic doubt on heat exchange. Consider this example situation. A cube of ice of mass ##m## and at temperature ##\theta <0°C## is put in contact with a resevoir exactly at the temperature ##T=0°C##. The question is: does the ice melts, i.e. does the ice pass to liquid state? Or...

Homework Statement In an adiabatic container are placed , in rapid succession , a mass of ice , ##m_I= 2 kg## , at temperature ##T_I = -10 ◦C## and a mass of water , ##m_W = 1 kg## , at the temperature ##T_W = + 20 ◦C## . Determine : a) the total mass of water present in the container at...

Homework Statement http://imgur.com/Sk6YkIf . You can take Va to be volume of cavity and Di to be density and Vo to be volume of cube and A to be surface area of container and h to be height of liquid column and Vi to be volume of immerser part of cube. Prove if water level will rise or will...

Since when you freeze liquid water, there's an expansion, wouldn't that mean there's work?