Ice Definition and 963 Threads

I am not sure if this was posted, or even if it belongs in Biology forum, but I found this a bit hinky Is it plausible the sample was contaminated? What are the odds of 2 life forms being in such a remote location and with no food to sustain themselves...

Homework Statement A Bullet of ice at a temperature of 0 degrees celieus is fired into a target Assuming that all the impact energy is retained by the ice what impact velocity is needed to melt 68% of the ice Homework Equations 1/2mv^2 Q = ml The Attempt at a Solution i got.. v^2 =...

You want to think about technology you can patent? Come up with a way to extract frozen water ice in the shadowed craters on the Moon, which are at temperatures approaching absolute zero. He who controls the lunar water, controls the future of human colonization on the Moon. Given that this...

Homework Statement An large metal bowl, shaped like a hemisphere, is at rest on a table. The diameter of the bowl is 1.60 m. A mischeivous young man decides to play with a 0.865 kg chunk of dry ice. He releases the chunk of dry ice on the inside upper lip of the bowl; the ice proceeds to...

Homework Statement An insulated beaker with negligible mass contains liquid water with a mass of 0.325 \rm{kg} and a temperature of 69.9 C. How much ice at a temperature of -15.0 C must be dropped into the water so that the final temperature of the system will be 39.0 C? Take the specific heat...

how much water to melt ice at 0 degC with water at 5 degC ? If heat required to melt 1kg of ice is equal to: 334 kJ and water at 5 degC provides: 4.2KJ/kg/degC * 5degC = 21 kJ/kg, then the amount of water needed to melt ice is qual to: 334 kJ / 21 kJ/kg = 16 kg Is this correct...

How long ago was the last ice age? Does an ice age pose any threats to species on Earth? If there were a 2nd ice age, would humanity survive it?

Homework Statement The following data is obtained: Weight of ice cube added 20 g Weight of copper calorimeter 80.5 g Weight of water in calorimeter 105 g Initial temp of ice cube -18 deg C Initial temp of water 23 deg C Final temp of water 6 deg C Specific Heat Capacity copper 385 J...

Homework Statement A 8.0×10^-2 kg ice cube at 0.0 degrees C is dropped into a Styrofoam cup holding 0.35 kg of water at 12 degrees C. A) Find the final temperature of the system. Assume the cup and the surroundings can be ignored. B) Find the amount of ice (if any) remaining. C) Find...

Hi everyone, I'm taking a first year physics course and our upcoming lab is an experiment to determine the Heat of fusion for ice. There are a few questions that I have. Firstly the overall equation is given as Lfm + cm (T2 - 0) = cmw (T1 - T2) + cAmA (T1 - T2) + q Where: m is the...

Homework Statement A hockey puck leaves a player's stick with a speed of 9.90 m/s and slides 35.0 m before coming to rest. Homework Equations Find the coefficient of friction between the puck and the ice. The Attempt at a Solution I don't even know how to approach this problem

Homework Statement There are four ice cream flavors; chocolate,cookies,strawberry and vanilla. How many different combination of flavors of three scoops of ice cream are possible if it is permissible to make all three scoops the same flavor? Homework Equations The Attempt at...

Why is it that the ice density vs temperature plot is non linear, it appears there is a bit of an inflection at T=-20C, does anyone know why this is?

Homework Statement A 400 cm3 glass is filled with 100 g of ice at 0°C and 170 g of water at 25°C. Characterize the content of the glass after equilibrium has been reached. Neglect heat transfer to and from the environment. _ g (mass of water) _ g (mass of ice) _°C (equilibrium...

I have decided to do away with the template; all calculations have been done, I'm just having trouble interpreting the results. An experiment was performed using a calorimeter and warm water. The data collected gave the following values for heat of fusion for ice, and heat of sublimation of dry...

Hi guys, Very long time, no see! Quick question: if water is left outside and freezes, was any energy consumed in the freezing process? And if so, would this energy be stored in the ice and be released when it melts? My gut is telling me that no energy is needed to freeze water...

i fill two ice trays, one covered and one not. The ice in the covered tray freezes the ice to the point that the ice is much more difficult to extract from the tray. Why is that?

Homework Statement What quantity of ice at 2 deg Celsius can be melted by 100 J of heat? Homework Equations q = m c (delta) t (mass x specific heat x change in temp) q = m l (mass x heat of fusion) specific heat of ice = 2.09 j/g-K heat of fusion = 6.01 kJ/mol The Attempt...

If a car is traveling at 30mph on concrete and hits a 1mile patch of solid ice what speed would it be traveling at on the ice

Amazingly 50,000 years of pollen analysis in the Amazonian pan sediments has revealed that the rainforest was consistent throughtout the glacial period without extensive savannah-isation due to the hypothesis of increased aridity. How did the Amazon stay supplied with so much rainfall during an...

The following experiment was performed to determine the latent heat of fusion of ice. A 50.0-g aluminum cup was filled with 100 g of warm water. The temperature of the cup and water stabilized at 35C. A 15-g piece of ice at 0C was placed in the water and quickly melted. The final temperature of...

Here is the point at Pittsburgh. The Allegheny is bringing in ice from the top of your picture. the Mon is flowing in from the right. Both rivers empty into the Ohio off to the left. Somehow, Ice flowed up the Mon. THe current is low today with a slight wind blowing left to right on your...

Not only grassland animals grew in size to mega proportions, but there's also evidence to suggest that some jungle animals did as well. The grasslands can perhaps be explained by increased aridity, but that alone can't explain twice size pleistocene tree-top monkeys, can it...

If you're riding a bike on ice with no friction and the wheels are rotating just as fast as they normally would when you're riding, will you fall down? (Since you're riding on frictionless ice you have would no linear momentum) I think that, due to conservation of angular momentum, the...

Homework Statement if the pH is 9.72 for the following 2 bases. what is the initial conc. of the bases a)LiOH b)HCN the answer for a is 10^-4.28, but i don't know how to set up an ice chart Homework Equations The Attempt at a Solution

Homework Statement A 75 gram ice cube at 0 degrees Celcius is placed in 825 grams of water at 25 degrees C. What is the final temperature of the mixture? Homework Equations What is the best formula to use in this question? The Attempt at a Solution I have attempted this problem...

Homework Statement A well-insulated bucket of negligible heat capacity contains 177 g of ice at 0°C. (a) If 20 g of steam at 100°C is injected into the bucket, what is the final equilibrium temperature of the system? I've already solved this part to be 0 degrees Celsius. (b) What...

1. An insulated beaker with negligible mass contains liquid water with a mass of 0.250 kg and a temperature of 76.1C. How much ice at a temperature of -12.5C must be dropped into the water so that the final temperature of the system will be 33.0C? Take the specific heat of liquid water to be...

Here is the original question: - Well, the answer that I came up with is, that, since there is no eternal force on the system, the centre of mass cannot be displaced, no matter what. Now, my doubts are regarding this itself. When the ice melts, it turns into water of lesser volume. In the...

"Sudden" Phase change of water to ice Last winter, I had a store-bought bottle of water I took snow camping. The closed bottle of water sat in the snow overnight. The next morning the water was still liquid, when I opened the bottle, I heard the hiss from the release of pressure on the bottle...

Hi everyone, I am a Cybernetics student and as part of a project I need to determine the feasability of building a small ice rink (approximately 2m x 4m) The plan is to build a frame and exterior (the sides and bottom of a box) out of wood, and have a layer of internal insulation such as...

Homework Statement How much heat in kcal is required to change 1.0 kg of ice, originally at -30 degrees C, into steam at 120 degrees C? Assume 1.0 atm of pressure. (Please use the following values for the constants needed in the problem: Latent heat of fusion=79.7 kcal/kg; Specific heat of...

Homework Statement How many 20 g ice cubes (whose initial temperature is -10 C) must be added to 1 L of water (whose initial temperature is 90 C) for the final mixture to have a temperature of 10 C. Assume that all the ice is melted and that the system is isolated Homework Equations...

Hi physics folks- Every year for the past 3 years, I have built an ice rink in my back yard. Unfortunately, I do not have the flattest back yard, in fact it has quite a downward slope and then a steep uphill slope. But, I'm determined the make the biggest rink I can reasonably make, given...

Homework Statement Ok, this is something related to a real life problem, more precisely a laboratory experiment. Say that the temperature of the room is 25°C. I have a calorimeter. I chose to put 250 g of water at 27.5 °C inside it. But as it is not a perfect calorimeter, say I've...

Hi all, My Undergraduate thesis requires me to design an ice making machine by modifying existing machines. I will appreciate your ideas on how I should go about it. Thanks in Advance! :smile:

Homework Statement Use a triple integral in rectangular coordinates to find the volume of the ice cream cone defined as follows The region R in the xy-plane is the circle of radius 1 with center at the origin. The sides of the cone are defined by the function z= \sqrt{x^2+y&2} The top of...

This is a story that just came out today (Nov. 16, 2009): Here's the story: http://www.nationalpost.com/todays-paper/story.html?id=2228018 Here's the paper: http://cat.inist.fr/?aModele=afficheN&cpsidt=20683217 Of course, its all Canada's fault again. :-p

Greetings, I'm trying to understand how protons might move through solid water ice. More specifically this concerns how deuterium/hydrogen ratios are used to date ice core samples drilled into glaciers. On one hand I am told that, once it is deposited from the atmosphere in the form of...

i was dumbstruck :bugeye: after hearing the statement "that ice didn't melt when placed in microwave" from one of my friend, and its indeed true i checked by myself.And now I'm looking for the reason :)

Homework Statement A 10 gram quantity of water at 25 degrees Celsius is poured onto a 400 gram block of ice which is at -10 degrees Celsius. Assume that all the heat is contained within these two objects. Determine the final equilibrium temperature. Specific heat of water is 4186 J/kgK...

Homework Statement A 60.9kg person wishes to run on ice. The coefficient of static friction between his shoes and the ice is 0.123. What is his maximum possible acceleration? Homework Equations Newton's laws of motion The Attempt at a Solution I figured that Fnet = Ffr, with me...

Here's a link to an animation from NASA of melting sea ice: http://www.nasa.gov/mov/391782main_sea_ice_concept.mov And also, a Science Journal Article on Arctic Ice: http://www.sciencemag.org/cgi/reprint/311/5768/1747.pdf GHG stands for Greenhouse Gases GIS stands for Greenland Ice Sheet LIG...

Homework Statement another conceptual problem I'm having here, goes like this; A piece of ice floats in a glass filled with water. The ice contains a small stone, so that when the ice has melted the stone will sink to the bottom of the glass. What will happen to the water level of the glass...

This is hypothetical question, but it does go the ability of polar ice caps to form and survive. Years ago I read about a computer simulations of a planet with a single circular continent centered on the north pole extending to the 30th N parallel. The continent was entirely flat with an...

Homework Statement 175 cm3 of hot tea at 87°C are poured into a very thin paper cup with 80 g of crushed ice at 0°C. Calculate the final temperature of the "ice tea". (Hint: think about two processes: melting the ice into liquid and, maybe, warming the liquid.) Homework Equations...

suppose we have a car on ice stuck in first gear. intuitively, I thought it should still be able attain maximum speed (in first gear) in a straight line, but it would take longer because it couldn't apply as much force before the force it applies is greater than the static friction between...

A considerable portion of E. Antarctica ice (average of 1.6 km height) rests on bedrock of 2000+ ft above sea level. https://www.physicsforums.com/showthread.php?t=344123" Would such a core suffice to cover enough glacial and inter-glacial periods; giving an adequate sample? Would any evidence...

Homework Statement A Ferris wheel with radius R turns with a constant angular velocity \omega. A child rides the Ferris wheel with a fresh ice cream cone. When the child reaches an angular position \varthetas [see diagram below], she is so distracted that she tips the cone and drops the nice...

On a cold winter morning, a child sits on a sled resting on smooth ice. When the 9.50kg sled is pulled with a horizontal force of 31.0 N, it begins to move with an acceleration of 2.50 m/s^2. The 24.0kg child accelerates too, but with a smaller acceleration than that of the sled. Thus, the...