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PHYS 273 ULTIMATE QUESTIONS AND ANSWERS (Actual quiz 100% correct)
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PHYS 273 ULTIMATE QUESTIONS ANDANSWERS 2023-2024(Actual quiz 100%
correct)
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
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