Exam (elaborations)
EGEE 101 Midterm Questions and Answers 2024
- Course
- Institution
Exam of 7 pages for the course EGEE at EGEE (EGEE 101 Midterm)
[Show more]
Content preview
EGEE 101 MidtermWhich has more potential energy
a). a cubic mile of water (a lake) behind a 300 ft tall dam
b). a car moving at 120 mph across the Bonneville Salts Flats
c). an oil tanker moving through the Suez Canal
d). an atomic bomb in a silo in North Dakota - answerA).
B and C aren't stationary, and the height of D is 0.
PE=mgh
Which has more chemical energy?A.A cubic mile of water (a lake) behind a 300 ft tall
dam
B.A car moving at 120 mph across the Bonneville Salt Flats
C.An oil tanker moving through the Suez Canal
D.An atomic bomb in a silo in North Dakota - answerAnswer: C.
A and B have no chemical energy. D has nuclear energy. C is a tanker full of oil, which
is chemical
Which has more nuclear energy?A.A cubic mile of water (a lake) behind a 300 ft tall
dam
B.A car moving at 120 mph across the Bonneville Salt Flats
C.An oil tanker moving through the Suez Canal
D.An atomic bomb in a silo in North Dakota - answerAnswer: D is the only option with
any nuclear energy
Which series goes from least energetic to most?
A.X-rays, visible, ultraviolet, radio
B.Radio, infrared, ultraviolet, X-rays
C.Gamma, infrared, visible, microwave
D.Microwave, ultraviolet, visible, radio - answerAnswer: B
Refer to the graph from Lecture 2
What energy transformation occurs in the engine of the car?
A. Chemical to potential
B. Heat to mechanical
C. Mechanical to heat
D. Kinetic to potential - answerB
, What energy transformation occurs in the brakes of the car?
A. Chemical to potential
B. Heat to mechanical
C. Mechanical to heat
D. Kinetic to potential - answerC
The inside of a concrete basement wall is 65° FThe outside is 55°F. Heat will leave the
building through this wall via
A.Convection
B.Conduction
C.Radiation
D.None of the above/don't know - answerAnswer: B
Conduction occurs through solid media...in this case, a concrete wall
Which has higher power?•
A: 1000 Joules used in 10 seconds•
B: 1000 Joules used in 100 seconds•
C: 1000 Joules used in 1000 seconds - answerAnswer: A1000J/10s = 100 WB = 10 WC
=1W
Which has higher energy?•
A: 1000 Joules used in 10 seconds•
B: 1000 Joules used in 100 seconds•
C: 1000 Joules used in 1000 seconds•
D: They all have the same energy - answerAnswer: D. Each option has 1000 Joules of
energy
A power plant consumes 1000 MJ of energy to produce 350 MJ of electric energy. What
is the efficiency of this process?
•A: 130%•B: 142%•C: 35%•D: 30%•E: 10% - answerAnswer: C. 350MJ/1000MJ
A power plant produces 100 MJ of electricity and 300 MJ of wasted Heat. What is the
Efficiency?
•A: 20%•B: 25%•C: 80%•D: 400%•E: 33% - answerAnswer: BTotal energy = electricity +
wasted heat = 100 MJ + 300 MJ = 400 MJ
Efficiency = useful energy/total energy = 100 MJ of electricity / 400 MJ = 0.25
A power plant consumes 100 MJ of Energy, of which only 24 MJ are wasted heat.
What is the efficiency?•A: 0.76•B: 0.24•C: 0.076•D: 1.00•E: 1.24 - answerAnswer: A).
Useful energy = Total energy - Wasted energy = 100 MJ - 24 MJ = 76 MJ
Efficiency = useful energy/total energy = 76 MJ / 100 MJ = 0.76
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller julianah420. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $12.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
79271 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now