Answer step-wise Example 1.3.2 A domestic oven has a heat transfer surface area of 1.5m². If the temperatureinside the oven is maintained at 200°C when the ambient temperature is 20° C, calculate theheat lost from the oven. Assume the walls of the oven to consist of an outside steel skin of1.6mm thickness, insulation of 25mm thickness and an inner steel skin of 2mm thickness.Take the values of thermal conductivity as k(steel) = 40W/mK, k(insulation) = 0.05 W/mK.Take the convective heat transfer coefficient on the inside and outside surfaces to be10W/m²K

Step 1: Find the total equivalent resistance Since the segments of the wall are stacked in a series…

Answered: Example 1.3.2 A domestic oven has a…

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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Problem 1.2. The Rankine temperature scale (abbreviated °R) uses the same size degrees as Fahrenheit, but measured up from absolute zero like kelvin (so Rankine is to Fahrenheit as kelvin is to Celsius). Find the conversion formula between Rankine and Fahrenheit, and also between Rankine and kelvin. What is room temperature on the Rankine scale?
PROBLEMS 1.1. In the table below, a number in the top row represents the pressure of a gas in the bulb of a constant-volume gas thermometer (corrected for dead space, thermal expansion of bulb, etc.) when the bulb is immersed in a water triple-point cell. The bottom row represents the corresponding readings of pressure when the bulb is surrounded by a material at a constant unknown temperature. Calculate the ideal- gas temperature T of this material. (Use five significant figures.) PTP, kPa P, kPa 133.32 99.992 33.331 66.661 102.37 204.69 153.54 51.190
The pressure, volume, and temperature of a mole of an ideal gas are related by the equation PV = 8.31T, where P is measured in kilopascals, V in liters, and T in kelvins. Use differentials to find the approximate change in the pressure if the volume increases from 10 L to 10.6 L and the temperature decreases from 335 K to 330 K. (Note whether the change is positive or negative in your answer. I Round your answer to ti decimal places.
Problem 3: Suppose a 500-mL beaker is filled to the brim with ethyl alcohol at a temperature of 5.00°C. You may assume the beaker is made of tempered glass, and has effectively zero thermal expansion. Randomized VariablesT = 22.5 °C Part (a) What volume, in milliliters, will overflow the beaker when its temperature reaches 22.5°C? The coefficient of volume expansion for ethyl alcohol is 1.100 × 10-3 /°C. Part (b) What volume of water, in milliliters, will overflow under the same conditions? The coefficient of volume expansion for water is 2.10 × 10-4 /°C.
Problem 1.42. The specific heat capacity of Albertson's Rotini Tricolore is ap- proximately 1.8 J/g °C. Suppose you toss 340 g of this pasta (at 25°C) into 1.5 liters of boiling water. What effect does this have on the temperature of the water (before there is time for the stove to provide more heat)?
A 6.00-m-long cylinder of solid aluminum has a radius of 3.00 cm. "If the cylinder is initially at a temperature of 7.00 C, how much will the length change when the temperature rises to 40.0°C? (Express your answer to three significant figures.) Submit m Due to the temperature increase, by how much (in %) would the density of the aluminum cylinder decrease? (Express your answer to three significant figures.) Submit % By what percentage does the volume of the cylinder increase? (Express your answer to three significant figures.) %
In an experiment on the specific heat of a metal, a 0.20 kg block of the metal at 150 °C is dropped in a copper calorimeter (of water equivalent 0.025 kg) containing 150 cm3 of water at 27 °C. The final temperature is 40 °C. Compute the specific heat of the metal. If heat losses to the surroundings are not negligible, is your answer greater or smaller than the actual value for specific heat of the metal ?
A (1.1x10^1) liter bottle is filled with nitrogen (N2) at STP (Standard Temperature and Pressure is 1 atm and 273 K) and closed tight. If the temperature is raised to 100° C, what will be the new pressure in SI units to two significant figures. Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: x10 Answer
A cup of coffee cools according to Newton's law of cooling (3) in Section 1.3. dT oT-Tm dt dT = k(T - Tm) or (3) dt Use data from the graph of the temperature T(t) in the figure to estimate the constants T To, and k in a model of the form of a first-order initial-value problem: dT/dt = k(T - T), T(0) = To: TA 200 - 150 100- 50- 0. 25 50 75 100 minutes Tm = To = k
Some stove tops are smooth ceramic for easy cleaning. If the ceramic is 0.600 cm thick and heat conduction occurs through the same area and at the same rate as computed in Example 1.11, what is the temperature difference across it? Ceramic has the same thermal conductivity as glass and brick.
Problem B.1: Temperature of Earth Our Sun shines bright with a luminosity of 3.828 x 10^26 Watt. Her energy is responsible for many processes and the habitable temperatures on the Earth that make our life possible. (a) Calculate the amount of energy arriving on the Earth in a single day. (b) How many litres of heating oil (energy density: 37.3 x 10^6 J/litre) is this equivalent? (c) The Earth reflects 30% of this energy: Determine the temperature on Earth's surface. (d) What other factors should be considered to get an even more precise temperature estimate? Note: The Earth's radius is 6370 km, the Sun's radius is 696 x 10^3 km; 1 AU is 1.495 x 10^8 km.
Neon is expanded isentropically from 2000 kPa and 770 K until the temperature drops to 275 K. What is the pressure, in kPa, at the final state? Report your answer to one decimal place using rounding. Assume that specific heats are constant.

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