Freaking and Thermo Test 1 Question
One week at home....blur blur macam ...losing my soul already....
Ah yesterday my uncle back from Ipoh and he always freak me out by telling ghost story!Yesterday night, he say that his friends who study Unimas encounter ghost... a room got 2 ppl sleeping and one of them is really sleeping and the other is too scare and he pura pura tidur! So the 2 ghosts know! Therefore, one of them said: 'Satu betul betul tidur! Satu lagi pura pura tidur!" Walaueh So 'mang' mar?
And another is that my uncle say during at Ipoh temple got a kid give the temple book to the thin air! And ppl ask why the children to that and he say he want to give them to read! Hey how do ghost handle the book? SO is freaking!!! Most kid can see them and the adults cant see them because we are dirty in other words...meanwhile the kids are still pure in their hearts!
So I'm so Heartless .....
Walaueh! I can't sleep whole night!!! Lucky I'm not at Sarawak at the moment furthermore I don't have roomate...well I have slept for 2 month alone and nothing happen lar of cause!
Make my mum worried only, she immediately "ORDER" me to take the saint book(a book full with the mumble jumbo words.....)! Well, I only bring the most basic temple book go (no power and non effective). After my uncle said that story make my mum jumpy already...haih ....
Actually the book is very useful depend the user who read it!
It can easy called the ghost come ...why? Because the want their sin atoned! After they listen the word we speak they will feel calm and peacefully and they will leave you alone most of them la!Hahaha! If you unlucky and summon your aulong ghost then you are dead meat, the people you kill in the pass long long ago or whatever, will come and have your life to repay your sin!!! So I seldom use that book. But now my mum force me to take it along to Sarawak! Yohss! Sarawak is so full with that thingsssss..... How am I going to read it peacefully? Well have to do nice thing, help people and eat vege alot la.
Uhhs, below is the Question and answer request from my friend! Sorry the late upload! And I also forget my user and password already!
Because my computer is masuk kilang, my ! I think it's time is up already so I may be have to buy some new hardware to build a new desktop! N your present are still seaching....very hard to find your taste....
Yohhss I also go to Taiping Tesco the 2nd largest in Malaysia!!!! Next time I come back from Sarawak the Gaint will open! Walaueh Kamunting have evolution alot! Lucky Taiping still as always! 8 Km go to the Tesco quite far.....
KNJ 1033 Thermodynamic Test 1 2007/2008
Mechanical and Manufacture Engineering , 1st Year (UNIMAS)
Q1
a. what is a closed system? Show the equation balance for a closed system..
b. define the first law of thermodynamic
c. a pressure gage connected to a tank reads 500 kPa at a location where the atmospheric pressure is 94kpa. determine the absolute pressure in the tank.
Q2
a. Consider blowing a balloon from 25cm in diameter to 70cm in diameter at785mmHg. Determine the work done to blow the balloon, Also determine the work done if the balloon was blown 25m under the water. The surface tension is negligible.Density of water and mercury is 995kg/m3 and 13.5951x10^3kg/m3.
b. Work done to expands 2L of gas withe speccific volume of 0.10m3/kg is 1500J. During this process, the internal energy decreases at a rate of 100kj per unit mass [kg]. Does the gas gain heat or lost it heat energy? Determine the amount of the heat released or gained. What would your answers be if 12L of gas is used.
Q3
a.Consider a fan located in a 2mx2m square duct. Velocity at various points at the outlet are measured. The averge velocity is determinded to be 9m/s. Taking the air density to 1.3kg/m3, determined the minimum electic power consumption of te fan. If the fan is kept on 5 hours a day, determine the cost to operate this fan for a month(30 days) if mthe cost of electricity is rm 0.05/kw.h
b. An ordinary egg can be approximately as a 5.5cm diameter sphere. The egg is initially at uniform temp of 8'c and is dropped into boiling water. Take the properties egg density 1020kg/m3 and Cv=3.32kj/kg.k.
Determine how much heat is transferred to the egg by the time the average temperatur of the egg rises to 80'c. If the egg is to be heated for 30min, determine the average rate of heat transfer to the ball and the average heat flux.
Q4
a An uninsulated stem pipe passes through a room in which the air and walls are at
25'c.The outside diameter of the pipe is 70mm and surface temp and emissivity are 200'c and 0.8. Determine the surface emissive power and irradiation. If the coefficient
associated with free covection heat transfer from the suface to the air is 15 w/m2k
determine the rate of heat loss from the surface per unit length of pipe.
b. A gas turbine is used to expand air at 1000Kpa and 750'c to 100kpa and 200'c The
average velocity of the air when it enters the turbine is 42m/s . the diameters of theturbine 's opening at the entrance and the exit are 560mm and the 1280mm. Determine the mass flow rate air through the turbine and the power produced by the turbine. gas constant 287jJ/kg.K and constant pressure specific heat of air 748K is 1.087 kJ/kg.K.
Q5
a. A 5kg of an ideal air inside a container has an initial tem and pressure of 30'c and 7 bar. After a few hours, the temp inside the container cools down to 10'c and the pressure become 4 bar . Determine the amount of air leak from the container in kg.
b. The burning of a metal inside a mold results in a mixture of products of combustion having the composition on a volume basis as follows; 4% Hydrogen, 28% carbon monoxide, 8% carbon dioxide and 60% nitrogen. Determine the gas constant, molecular mass, mass
fraction for each gas, and the specific heart (Cp and Cv) of the gas mixture.If the gases inside the mold are compressed from the 140kPa and 400'c in adiabatic process to 1400kPa, find the final mixture temperature.
The solution is uploaded here
profile.imageshack.us/user/Hea…Hey I don't have all the answers! You must see the lecturer for more information! All student can copy the answers from Cik Site staff room! Good luck! By the way now I'm at Pokok Assam, Taiping.
I be at Penang on 27Oct and 28 Oct fly to Sarawak already!
Dosste?Dosste? Dosste? Kero!