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When one chemical material is changed into one or more other chemical substances, such as when iron…

Answered: A is a process that occurs when one or…

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Mercury is the only metal that exists as a liquid (d=13.56 g/cm3) at room temperature. Find the number of moles in 15 mL of mercury.
A 0.0545 kg chunk of an unknown metal that has been in boiling water for several minutes is quickly dropped into an insulating Styrofoam beaker that contains 0.462 kg of water at room temperature (20.0° C). After waiting for a few minutes, you observe that the water's temperature has reached a constant value of 22.0° C. Part A Assuming that the Styrofoam absorbs a negligibly small amount of heat and that no heat was lost to the surroundings, what is the specific heat of the metal? Express your answer in joules per kilogram-kelvin to three significant figures. ΑΣφ J/(kg · K) C = Submit Request Answer Part B Use the table below to identify the metal. Specific heat (c) Material J/(kg K) cal/(g K) Solids Lead 0.13 x 103 0.031 Mercury 0.14 × 103 0.033 Silver 0.23 × 103 0.056 Copper 0.39 × 10³ 0.093 Iron 0.47 x 103 0.112 Marble (CACO3) 0.88 × 10³ 0.21 Salt 0.88 × 103 0.21 Aluminum 0.91 × 103 0.217 Beryllium 1 97 x 103 0.471
Q12: Copper has 1.09 x 10¹ vacancies/cm' at equilibrium at 900 K. What fraction of atomic sites are vacant at 1150 "K? Assume the density of the copper is 8.96 g/cm² and the atomic weight is 63.54 g/mol. The gas constant is 8.314 J/mol-K and Avogadro number is 6.022 x 10 aroma.l.
When a solid sample was heated, its temperature increased but it did not melt. What has happened to the average molecular kinetic energies of the atoms in the sample and why? A Kinetic energy remained the same because potential energy decreased B Kinetic energy remained the same because potential energy increased C Kinetic energy decreased because the temperature increased D Kinetic energy increased because the temperature increased A spoon, a fork, and a knife are stacked on top of each other overnight. The temperature of both the fork and spoon is 21°C the next morning. According to thermal equilibrium, what can be predicted about the temperature of the knife? A The temperature of the knife is also 21°C because equilibrium has been reached between all three objects. B The temperature of the knife could only be determined through measurement. C The temperature of the spoon and fork are both conducted to the knife giving it a resulting temperature of 42°C. D The temperature of the…
1. A) How much diesel fuel (gallons) is required to move a unit train (100 cars) with 125 tons of freight per car from Salt Lake City to Denver (517 mi)? b)The density of diesel fuel is 6.9 lb/gallon, how much CO2 is emitted by the train? type of fuel Carbon content Cf t-CO2/t-Fuel Diesel/Gas Oil 0.875 3.206000
Jessica is walking down the NYC while eating a hot dog. Her walking is making her lose calories. Her eating the hot dog is making her gain calories. The rate as which she is losing calories per minute is defined as f(t)=t^2+5. The rate at which she is gaining calories per minute is defined as g(t) =10t+50. Before her walk, she had already eaten an entire pretzel which contained 300 calories. a.) From the 0th minute to the 8th minute, approximate how many calories Jessiva has lost using LRS approximation of 4 subintervals. b.) What is the actual number of calories Jessica has lost on her 8 minute walk? c.) What is the exact number of calories Jessica has gained, eating her hotdog for 8 minutes? d.) What is the average rate of calorie loss during her walk? (Please use the average value formula) e.) At what time will Jessica have a net gain/loss of calories at 0? f.) After her 8 minute walk and taking into account the pretzel she had eaten prior, how many calories has Jessica…
The recommended daily caloric intake is 2000 calories (8,400,000J). This is because this is the same value for how much the average body loses to heat and work in a typical day (your change in energy is zero because you take in the same amount of energy you lose). A) If you lose a total of 8,400,000J (Qout+W=total lost), but consume 1200 calories of food (5,000,000J), what would your change in energy be? B) Assuming your change in energy is negative (hint-it should be), where does your body get the extra energy to maintain it's temperature?
One component of a metal sculpture consists of a solid cube with an edge of length 36.9 cm. The alloy used to make the cube has a density of 6610 kg/m³. Find the cube's mass. m = kg
The boiling point of a liquid is 28.3°C. A portion of the liquid is at equilibrium with its vapor at 22.3°C in a sealed flask. The temperature rises to to 32.6°C.What happens inside the container? Liquid is converted to vapor, the new equilbrium mixture contains less liquid and more vapor. The vapor is all converted to liquid. Vapor is converted to liquid, the new equilibrium mixture contains more liquid and less vapor. The liquid is all converted to vapor.
If the mole fraction of n-pentane in a liquid mixture is 0.43, and its partial pressure (vapor pressure) above the liquid is 0.24 bars, what is the vapor pressure of pure n-pentane at the same temperature (in bars)? Assume it is an ideal solution. 0.0 0.24 1.79 0.56 0.103 OOOO
Please answer this question.
4. a) Two bottles, A and B, are exposed to sunlight for three hours. Bottle A is deformed after the exposure and the measured temperature of both bottles' surfaces is 80°C. There are only two type of polymers, poly(ethylene terephthalate) and polycarbonate, to be used to make the bottles. By using the information provided in Table Q4(a), identify with reason the type of polymer that can be used to make: i. Bottle A ii. Bottle B Table Q4(a) Materials Оperating Temperature (°C) Glass Transition Temperature (C) Poly(ethylene terephthalate) (PET) Polycarbonate (PC) b) Outline the differences between Fig. 4(i) and Fig. 4(ii). 80 69 80 150 Fig. Q4(i) Fig. Q4(ii)

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A is a process that occurs when one or more substances are changed into one or more new substances. For example, when zinc and sulfur are mixed together with the addition of energy in the form of heat, zinc sulfide (ZnS) is produced.