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Egee Midterm Exam 1 Review Questions And Answers 2025
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Egee Midterm Exam 1 Review Questions And Answers 2025
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Terms in this set (100) Q&AEgee Midterm Exam 1 Review Questions
And Answers 2025
A ball of mass 2 kg is placed at position A at a height of 50 m from the
ground. The initial velocity is 0 m/s. If the ball starts rolling down an inclined
plane, what are the potential and kinetic energies at positions A, B, C and
D in Joules assuming that the ball does not experience any frictional force
(total mechanical energy does not change)? Please use 9.8 m/s2 for the
gravitational constant when calculating potential energy. The heights of
positions A, B, C, and D are listed below: - Potential @ A 980 Kinetic @ A
0
Potential @ B 490 Kinetic @ B 490
, Terms in this set (100) Q&A
Potential @ C 490 Kinetic @ C 490
Potential @ D 0 Kinetic @ D 980
What is the velocity of the ball in meters per second when it reaches point
B or C (round to the nearest whole number)? 22
A power plant consumes 100 MJ of Energy, of which only 24 MJ are
wasted heat. What is the efficiency? - 0.76
A power plant converts 100 kJ of coal into 30 kJ of electrical energy. What
is the efficiency? - 30%
A wind turbine costs $10 million to construct and generates $1 million worth
of electricity per year. When has the wind turbine paid for itself (what is the
pay-back period)? - 10 Years
Approximately how many people do you think die in coal mines each year
in the US? - tens
At $260/ton, what is the price of coal per MMBTU? - $10
At $3/MCF, what is the price of natural gas per MMBTU? - $3
At $52/ton, what is the price of coal per MMBTU? - $2
At $58/bbl, what is the price of oil per MMBTU? - $10
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