/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Q. 34 || A 10 m脳14 m house is built o... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 19: Q. 34 (page 544)

|| A 10 m脳14 m house is built on a 12-cm-thick concrete slab.

What is the heat-loss rate through the slab if the ground temperature

is 5掳C while the interior of the house is 22掳C?

Short Answer

Expert verified

The power needed is 15.9 kW

Step by step solution

01

Formula to use in this problem

For thermal conduction,

dQdt=kAL鈭�T,

where dQ is the heat transferred in dt and dt is the time differential. If the time difference is unit,P=dQdt

02

Rearrangement of the equation and finding of the power needed

As our surface is rectangular, A=ab, where a and b are the dimensions of the floor. So,

P=kab鈭�TL=0.8路10路14路(22-5)0.12=1.59路104=15.9kW

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91影视!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

How much work is done on the gas in the process shown in Figure EX19.2?

500 J of work must be done to compress a gas to half its initial volume at constant temperature. How much work must be done to compress the gas by a factor of 10, starting from its initial volume?

A monatomic gas follows the process 1S 2S 3 shown in

Figure EX19.32. How much heat is needed for (a) process 1S 2

and (b) process 2S 3?

Two cars collide head-on while each is traveling at 80 km/h.

Suppose all their kinetic energy is transformed into the thermal

energy of the wrecks. What is the temperature increase of each

car? You can assume that each car鈥檚 specific heat is that of iron.

Draw a first-law bar chart (see Figure 19.12) for the gas process in Figure EX19.9
See all solutions

Recommended explanations on Physics Textbooks

Energy Physics

Read Explanation

Linear Momentum

Read Explanation

Mechanics and Materials

Read Explanation

Translational Dynamics

Read Explanation

Rotational Dynamics

Read Explanation

Electricity

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.