Keep a diary of all trips you make for a period of three to five days. Record the purpose of the trip, how you traveled, the approximate distance traveled and the trip time. What conclusions can you draw from the data?
What will be an ideal response?
The table shown on the next page provides a list of all trips made by a student during a five-day period. The following conclusions can be reached about the student’s travel behavior.
? 24 trips were made (an average of 4.8 trips per day)
? 8 trips by bus
? 9 trips by car
? 7 trips by walking
? 248 minutes were spent traveling (an average of 49.6 minutes per day)
? 77 minutes of travel by bus (31% of total travel time)
? 90 minutes of travel by car (36% of total travel time)
? 81 minutes of travel by walking (33% of total travel time)
? About an equal amount of time was spent riding buses, walking, and driving a car.
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Two kilograms of carbon dioxide expand in a cylinder at a constant temperature of 24ºC from a pressure of 800 kPa to 100 kPa. Assuming a quasi-equilibrium process, the required heat transfer is nearest:
A) 401 kJ B) 354 kJ C) 267 kJ D) 233 kJ
Teddy Roosevelt helped to end the 1902 strike in the anthracite coal mines by
A. using the military to force the miners back to work. B. passing legislation making the miners' union illegal. C. helping the mine owners to import strike-breakers. D. serving as a labor mediator to have the miners' union and mine owners come to a negotiated settlement guaranteeing the right of the miners to unionize. E. threatening to seize the mines and to operate them with federal troops.
When a point below eye level is sighted, the angle formed by the line of sight and the horizontal is called the angle of elevation.
Answer the following statement true (T) or false (F)
The automatic expansion valve maintains a constant ____________________.
Fill in the blank(s) with the appropriate word(s).