Determine the increase in internal energy of the system in

Assignment Help Mechanical Engineering
Reference no: EM13638036

The heat-transfer rate to the surroundings from a person at rest is about 100W. Supposed the ventilation system fails in an auditorium containing 2000 people. Assume there is no heat transfer through the walls.

A.) Determine the increase in internal energy of the system in the auditorium during the first 20 minutes after the ventilation system fails.

B.) Considering the auditorium and all of the people as a system, determine the increase in internal energy (MJ) of the system. How do you explain the fact that the temperature of the air increases?

Reference no: EM13638036

Questions Cloud

Consider a 1g sample of radioactive californium z98 and : consider a 1g sample of radioactive californium z98 and a245. the half life of this isotope is 45 min. on average how
Say a random variable x is drawn uniformly from between 0 : say a random variable x is drawn uniformly from between 0 and 1. say that y sin2pix. what is the covariance between x
Calculate the rms speed of a carbon dioxide molecule at : a calculate the rms speed of a carbon dioxide molecule at 25degc.b determine how many times per second it would move
The weekly incomes of shift foreman for a given industry : the weekly incomes of shift foreman for a given industry follow a normal probability distribution. with a mean of 1000
Determine the increase in internal energy of the system in : the heat-transfer rate to the surroundings from a person at rest is about 100w. supposed the ventilation system fails
An airline has classified its customers as high-volume : an airline has classified its customers as high-volume travelers assumed to be business travelers or low-volume
A 72-kg sprinter accelerates from rest to a speed of 110 ms : a 72-kg sprinter accelerates from rest to a speed of 11.0 ms in 5.7 s.a calculate the mechanical work done by the
Pick a collection of values in reference to various : pick a collection of values in reference to various variables from a web site. describe and list a few examples of your
After 42s the center of the sphere is measured to be 100c : a 3-cm diameter pure-aluminum sphere is heated to an initial temperature of 175c and then immersed in a fluid at 25c.

Reviews

Write a Review

Mechanical Engineering Questions & Answers

  A 07-lb block rests on top of a 05-lb block supported by

a 0.7-lb block rests on top of a 0.5-lb block supported by but not attached to a spring of constant 9 lbft. the upper

  The plate is subjected to an axial force of 75 kn the

the a-36 steel plate has a thickness of 12 mm and other dimensions. r30mm p60mm ab200mm bc800mm cd200 width120mm. the

  Show the compression process on p-v diagram label the

r-134a enters a water-cooled compressor as saturated vapor at 1 bar with a mass flow rate of 0.9 kgmin. the inlet area

  Assume constant specific heats where cwater 4179 kjkg-k

initially an insulated rigid tank contains 18.67 kg of water at 21.45oc and 101 kpa. the tank also contains a 3.66 kg

  Consider a light single-engine airplane such as the piper

consider a light single-engine airplane such as the piper super cub. if the maximum gross weight of the airplane is

  The steam leaves the turbine at 100 mm hg absolute pressure

a geothermal power plant utilizes steam produced by natural means underground. steam wells are drilled to tap this

  Carbon monoxide at 77f 1 atm enters and insulated reactor

carbon monoxide at 77f 1 atm enters and insulated reactor operating at steady state and burns with air entering at 77 f

  A privately owned summer camp has the following data for a

a privately owned summer camp has the following data for a 12-week sessioncharge per camper 480 per weekfixed costs

  The mass of the piston is such that a cylinder pressure of

10 kg of water in a piston-cylinder arrangement exists as saturated liquidvapor at 100 kpa with a quality of 50. it is

  Compression is isentropic to the condenser pressure of

the following figure shows the schematic diagram of a vapor compression refrigeration system using r-134a as the

  What is the average air pressure exerted on the piston

homebuilding has undergone significant advances in the last 20 years due largely to replacement of hand tools hammers

  Estimate when the beverage will have a temperature of

a long beer can made of thin al sheet l 1 cm k 205 wmk is removed from refrigerator and set on a table air temp

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd