Exam (elaborations)
PHYS 273 Actual Questions and Answers with complete solution
- Course
- PHYS 273
- Institution
- Concordia University ( )
PHYS 273 Actual Questions and Answers with complete solution
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1. Energy is :a) Power
b) A force of nature
c) Amount of momentum
d) The ability to do work
2. If you double the speed of an object how does its kinetic energy change?
a) Stays the same
b) It doubles
c) It triples
d) It quadruples
3. Which of the following could NOT be a unit of power?
a) Joules per second
b) Watts
c) Calories per hour
d) Joules
4. Home appliances that produce heat tend to be low power.
a) True
b) False
5. A process that occurs spontaneously in one direction is called
a) Reversible
b) Irreversible
c) Undeniable
d) Insatiable
6. Only a small percentage of the electricity we use in produced by converting mechanical energy
into electrical energy
a) True
b) False
7. Most countries depend on fossil fuels for more than 50% of their energy needs.
a) True
b) False
8. Energy use per person is much higher
, a) In highly developed countries
b) In less developed countries
9. In which hemisphere are most of the known coal reserves found?
a) Northern
b) Southern
c) It is approximately equal
10. There hasn't been a major mining accident in canada since the 1970’s
a) True
b) False
11. Light intensity is
a) The energy of the light on some area
b) The momentum of a light wave
c) The total energy of all the light captured
d) The power divided by the area over which the light shines
12. A flat plate collector is similar to the small solar panel in a calculator and takes the sun’s
energy and turns it into usable electricity.
a) True
b) False
13. In the future with better engineering we could have propellor style windmills with efficiencies
of up to 75%
a) True
b) False
14. Canada is one of the top 3 countries in terms of total power produced by wind
a) True
b) False
15. Spent nuclear fuel has been used up and therefore is no longer radioactive.
a) True
, b) False
16. The total fraction of energy generated by nuclear power worldwide is predicted to increase by
2040.
a) True
b) False
17. A good home insulation will not be good at transferring heat.
a) True
b) False
18. The standard that certifies energy efficient products is called
a) Energy star
b) Green star
c) Canadenergy
d) GreenLite
19. What compound is produced by incomplete combustion of fossil carbon?
a) CO2
b) CO
c) NO2
d) N2
20. Which of the following is a primary pollutant?
a) SO2
b) SO3
c) Sulphuric Acid
21. In the last 100 years, overall, the average distribution of marine taxonomic groups has
a) Shifted towards colder water regions
b) Shifted towards warmer water regions
c) Not changed significantly
22. The ratio of different types of carbon in the atmosphere tells us
a) That the increase in atmospheric CO2 is from very old sources
b) That CO2 levels have increased since the 1800s
, c) Nothing about the source of atmospheric CO2
23. A stabilization wedge is
a) A strategy that could correspond to no warming by 2050
b) A strategy that could correspond to about a 1 billion ton CO2 reduction by 2050
c) The amount of CO2 that is needed in order to have a stable temperature
d) A block of wood used to stop a door from closing
24. Climate change related changes in precipitation are predicted to
a) Be uniform
b) Increase precipitation in dry regions
c) Increase precipitation in wet regions
25. Saying “the electromagnetic spectrum” is the same as saying “visible light”.
a) True
b) False
26. How is the majority of electricity produced in Canada?
a) Solar
b) Coal
c) Uranium
d) Hydro
27. Per BTU of energy, how does the cost of natural gas compare to the cost of gasoline?
a) Gasoline is about 4 times more expensive than natural gas.
b) Gasoline is about 2 times more expensive than natural gas.
c) Gasoline is about 2 times less expensive than natural gas.
d) Gasoline is about 4 times less expensive than natural gas.
28. Saying “the electromagnetic spectrum
” is the same as saying “visible light”.
a) True
b) False
29. The sun’s energy reaches Earth in the form of
a) Chemical energy
b) Thermal energy
c) Nuclear energy
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