Concordia University

PHYS 273

Midterm Practice

Question 1): Net metering___________

1. Allows you to buy electricity at a lower rate from provider
2. allows you to sell (or exchange for credit) excess solar power that you have generated back  to the provider
3. Is not available in QC

Only viable option if you can produce 100% (or more) the energy you consumer

2. In Canada which sector uses the most natural gas?

1. 1. Energy Industry.
   2. Residential.
   3. Commercial and Institutional.
   4. Industrial.
   5. Generation of Electricity.

3. Using the Sankey diagram: Most energy produced by coal is used for

1. 1. electricity.
   2. transport.
   3. the energy industry.

4. A battery contains 1000 joules of energy. The maximum amount of work it can do is 1000 joules. This is an example of

1. 1. the Law of Conservation of Energy.
   2. the First Law of Thermodynamics.
   3. neither the First Law of Thermodynamics nor the Law of Conservation of Energy. d both the First Law of Thermodynamics and the Law of Conservation of Energy.

5. Dino and Jake are out for a walk together pushing their strollers. They each exert the same force on their strollers. Dino walks twice as far as Jake.

1. 1. Dino does twice as much work as Jake.
   2. They do the same amount of work
   3. Jake does twice as much work as Dino
   4. Neither of them do any work.

6. A chair is sliding across a rough horizontal floor. The chair starts with 100J of kinetic energy and slows down and comes to a stop. What happened to the kinetic energy of the chair?

1. 1. Kinetic energy ever only lasts for short amounts of time.
   2. The kinetic energy was transformed into heat due to the friction with the floor.
   3. The kinetic energy was transformed into gravitational potential energy.
   4. The chair’s kinetic energy did not change.

7. When fossil fuels form, the different types that form depend on several conditions. Which of these is not a condition?

1. 1. the pressure conditions while decomposing.
   2. the amount of time decomposing.
   3. the temperature at and around the decomposition.
   4. the geolocation of the fossil fuel being formed.
   5. the type of organic matter decomposing.

8. The part of an oil drilling rig responsible for breaking the rock as the drill penetrates the ground is called,

8. 1. The derrick
   2. The injection head
   3. The quagmire
   4. The tri cone
   5. The core sampler
9. Which if these is not true about entropy?

1. 1. The entropy of an object or system always increases.
   2. The higher the entropy of an object or system, the more disordered it will be.
   3. Entropy is used to state the second law of thermodynamics.
   4. Entropy explains the direction of time in an isolated thermal system.
   5. If the entropy of an isolated system is not changing, then it must have reached equilibrium.

10. Which of these does not describe electromagnetic energy?