The simplified equation for heat conduction across a plate is: AT kI AQ At where Q...
Fantastic news! We've Found the answer you've been seeking!
Question:
Transcribed Image Text:
The simplified equation for heat conduction across a plate is: AT kÁI AQ At where Q is the quantity of heat (J), t is time (seconds), A is area of the plate (m²), T is temperature (properly Kelvins but can use Celsius here), kr is the thermal conductivity of the material (W/(m-K)), and Lis thickness of the plate (m). Use this information to solve the following problem. A cooler shaped as a cube (each side is 45 cm) is hung from a hook. The cooler walls are 4 cm thick. The whole cooler is made of Styrofoam with a (kr-0.033 W/(m-K)). The outside temperature is 35 "C (it is NC in the summertime). The interior of the cooler holds ice at 0 °C. Determine how much ice (Ibm) in the cooler has melted in 2 hours. Report to 2 decimal places. Assume it takes 334 J of heat to melt 1 g of ice. If all other conditions are held the same, do you want a material with a higher or lower value of thermal conductivity for your cooler? Why? The simplified equation for heat conduction across a plate is: AT kÁI AQ At where Q is the quantity of heat (J), t is time (seconds), A is area of the plate (m²), T is temperature (properly Kelvins but can use Celsius here), kr is the thermal conductivity of the material (W/(m-K)), and Lis thickness of the plate (m). Use this information to solve the following problem. A cooler shaped as a cube (each side is 45 cm) is hung from a hook. The cooler walls are 4 cm thick. The whole cooler is made of Styrofoam with a (kr-0.033 W/(m-K)). The outside temperature is 35 "C (it is NC in the summertime). The interior of the cooler holds ice at 0 °C. Determine how much ice (Ibm) in the cooler has melted in 2 hours. Report to 2 decimal places. Assume it takes 334 J of heat to melt 1 g of ice. If all other conditions are held the same, do you want a material with a higher or lower value of thermal conductivity for your cooler? Why?
Expert Answer:
Answer rating: 100% (QA)
The rate of heat transfer through the cooler walls is given by the equation Qt kAT1 T2L where Qt is ... View the full answer
Related Book For
Physics
ISBN: 9781119539636
11th Edition
Authors: John D. Cutnell, Kenneth W. Johnson, David Young, Shane Stadler
Posted Date:
Students also viewed these physics questions
-
Discuss how organisational ethics can be made impactful for smooth business operations?
-
In year 1, the prices of goods X, Y, and Z are $2, $4, and $6 per unit, respectively. In year 2, the prices of good X, Y, and Z are $3, $4, and $7, respectively. In year 2, twice as many units of...
-
Nitrogen enters a steady-flow heat exchanger at 150 kPa, 10C, and 100 m/s, and it receives heat in the amount of 120 kJ/kg as it flows through it. Nitrogen leaves the heat exchanger at 100 kPa with a...
-
How hard is it to reach a businessperson by phone? Let p be the proportion of calls to businesspeople for which the caller reaches the person being called on the first try. (a) If you have no...
-
Using the variance data for Menounos Manufacturing Co., prepare an income statement through gross profit for the year ended December 31, 20Y6. Assume the company sold 3,000 units at $100 per unit.
-
The Northshore Bank is working to develop an efficient work schedule for full-time and part-time tellers. The schedule must provide for efficient operation of the bank including adequate customer...
-
Based on the above case study, "Want-2-Work", present each of the following: 1) ER diagram 2) Relational model 3) Rules or assumptions made 4) Between 3 or 5 queries using the relational model...
-
Cinder Inc. is a Canadian-controlled private corporation based in your province. The company operates a wholesale business. The following information is provided for its year ended May 31, 2020: 1....
-
Demoplis Food had 5 million shares of stock outstanding at the end of the last year. Last year, the company reported net income of $20 million, retained earnings of $5 million, and paid $15 million...
-
Alan made 35,000 in taxable income last year. Suppose the income tax rate is 15% for the 9500 first plus 18% for the amount over $8800 How much must Alan pay in income tax for last year?
-
Can you help me to make PFD (or just make the block diagram or schematic diagram) for carbon dioxide capture and storage (CCS) project. Thank you. Process Description You might write some dot points...
-
In the following diagram, identify the type of solution (hypertonic, hypotonic, or isotonic) in which the red blood cells are immersed, with a written explanation to justify your response. (a) Water...
-
Identify and describe at least two (2) strategies that can support team cohesion , participation and performance throughout the life of a project.
-
This week he is due to discuss "Too big to fail" regulatory policy. Different countries have followed different policies when their financial institutions were at risk of bankruptcy. Some held them...
-
Entrepreneurship: Testing and Experimenting in Markets How have large companies such as Subways used pilot experiments to test the viability of their product? Provide examples.
-
Tarick Toys Company manufactures video game consoles and accounts for product costs using process costing. The following information is available regarding its June inventories. The following...
-
A certain object is in equilibrium. Which one of the following statements is not true? (a) The object must be at rest. (b) The object has a constant velocity. (c) The object has no acceleration. (d)...
-
You and your team spot a strange object hovering over the open ocean in broad daylight. You have nothing to reference in order to estimate its distance, height, or size, but you get the idea to use a...
-
Under what condition(s) is the angular momentum of a rotating body, such as a spinning ice skater, conserved? (a) Each external force acting on the body must be zero. (b) Each external force and each...
-
One of the newest thrill rides to open in the Walt Disney World Resort may just be the most impressive. As Disney approached its 50th anniversary, the company wanted to celebrate in a truly special...
-
Consider the case on the BBCs Digital Initiative Media in this chapter. What do you think were the main problems associated with the BBCs approach to project management? What challenges did the...
-
The largest professional project management organization in the world is the Project Management Institute (PMI). Go to its Web site, www.pmi.org, and examine the links you find. Which links suggest...
Study smarter with the SolutionInn App