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 spring-mass system has a frequency of 2 hz when the mass

a spring-mass system has a frequency of 2 hz. when the mass is decreased by 0.4 kg the frequency is changed by 25.

  The temperature remains constant at 20degc what is the

an initially deflated flat balloon is connected by a valve to a 12 m3 storage tank containing helium gas 2 mpa and

  O is the centre of the cylinder and g is the centre of mass

a 20kg cylinder with radius of gyration 0.602m slips on a surface 20 degrees to the horizontal. the cylinder rotates

  A 3-phase 25 kva 208 v 60 hz alternator generator is

a 3-phase 25 kva 208 v 60 hz alternator generator is operating under balanced conditions and supplies a current of 20 a

  A block weighing 100 lbf sits on a 20ordm inclined surface

a block weighing 100 lbf sits on a 20ordm inclined surface. the coefficients of static and dynamic kinetic friction are

  If the flow rate of water is measured to be 03 m3s

water is pumped from a lower reservoir to a higher reservoir by a pump that provides 21 kw of shaft power. the free

  Differences between fire-tube boilers and water-tube boilers

Explain the differences between fire-tube boilers and water-tube boilers and discuss the major factors which affect the choice of boiler type for particular applications.

  A spur pinion d 100 mm has a torque of 225 nm applied to

a spur pinion d 100 mm has a torque of 225 nm applied to it. for pressure angle of 20 degreea. calculate wt wn and wr

  How many bq becquerels of 90sr are present b how many bq of

a 6.2 mg sample of 90sr half-life 29.12 y is in secular equilibrium with its daughter 90y half-life 64.0 h. a how many

  Heated air at 1 atm and 100 degrees f is to be transported

heated air at 1 atm and 100 degrees f is to be transported in a 400 ft long circular plasitc duct at a rate of 12ft3s.

  Heat is added to the water in the cylinder at constant

a piston cylinder device contains 1 kg of liquid water at 200kpa and 25 deg c. heat is added to the water in the

  Determine the maximum thermal efficiency for any power

ocean temperature energy conversion otec power plants generate power by utilizing the naturally occurring decrease with

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