A. Pre lab Questions:
1.Answers to questions demonstrate understanding of principles described in laboratory manual instructions
2.Calculations are clearly set out using given data and correct relationships from laboratory manual instructions
B. Recorded data:
1.Data entered clearly in tables (or appropriate spaces) to a reasonable number of significant figures
2.Recorded data includes appropriate units row/column headings and units
EGB113 Energy In Engineering Systems Assignment-QUT University Australia.
C.Graphs:
1.Informative graph titles
2.Axes clearly labelled with title and correct axis units
3.Axis values indicated (with multipliers if appropriate)
4.Appropriate trend lines identified and neatly drawn (or otherwise determined with evidence)
Data Analysis:
1.Well set out calculations showing data obtained from measurements or graphs substituted clearly into formulae,identifying any specific techniques of data analysis that were used.
Conceptual Understanding:
1.Your answers to any questions asked in the experimental instructions are plausible within the context of the experiment
2.Answers to questions demonstrate understanding of connection between obtained data and the physical concepts described in the laboratory manual instructions
PRE-LAB QUESTIONS
Read the laboratory manual instructions for this experiment and answer these questions before the lab class
PART A
1.Write an expression describing the energy conversion that occurs in Part A of the experiment.
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2.The experiment in Part A is run using a 0.115 kg mass attached to a thread wound around the pulley. It falls from rest through a vertical height of 1.209 m in 0.66 s. Assuming that the acceleration of the mass is constant, calculate the velocity of the mass at the end of its fall. (Hint: the acceleration probably won’t be 9.8 ms-2).
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EGB113 Energy In Engineering Systems Assignment-QUT University Australia.
PART B
3.In 1-2 sentences, explain the basics of hydroelectric power generation.
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4.A dam 143 m above a hydroelectric generator holds 1.6 x 1015 L of water. If the generator is taken to be at a height of 0 m, how much potential energy is stored in the dam?
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EXPERIMENTAL OBSERVATIONS
PART A
Sketch the graph of power vs time from the computer here. Remember to insert informative graph title, labels on axes, an indicative scale and units.
Height 1 (h1) = ___ ( )
Show sample calculations for potential, kinetic and unaccounted energy here
Height 2 (h2) = ___ ( )
Height 3 (h3) = ___ ( )
Answer this question after completing Part A
On the last page of the proforma, plot efficiency vs mass for the three different heights that were investigated. What, if anything, can you conclude from the graph?
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PART B
Diameter of water cylinder = 2r = ——————— ( )
Height of Nozzle hnozzle = ——————— ( )
Initial height of water column h Top = ——————— ( )
Final height of water column h Bottom = ——————— ( )
Energy Generated (area under P vs t graph) = ———————- ( )
Sketch the graph of power vs time from the computer here. Remember to insert informative graph title, labels on axes, an indicative scale and units.
Using Equation 5, calculate the mass of water used below:
Using Equations 4 and 2, calculate the change in potential energy:
Calculate the efficiency of the conversion of potential energy to electrical energy:
Answer this question after completing Part B
Why isn’t the conversion process 100% efficient? Where does the rest of the energy go?
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Part A Graph
Plot efficiency vs mass for the three different heights that were investigated. Remember the graph title, labels on axes, and units.
EGB113 Energy In Engineering Systems Assignment-QUT University Australia.
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