Question

The energy expenditure value of traveling by car is 3.6 MJ/passenger-kilometer. For 1 person making a trip of 1000 km, if a gallon of gasoline contains 120 MJ, approximately how many gallons of gasoline would be required:

a) 3
b) 9
c) 30
d) 60

Answer 1

To calculate the number of gallons of gasoline required for a trip, divide the total energy consumed by the energy content of a gallon of gasoline. In this case, for a trip of 1000 km, approximately 30 gallons of gasoline would be required.

Step-by-step explanation:

To calculate the number of gallons of gasoline required, we need to find the total energy consumed by the trip and divide it by the energy content of a gallon of gasoline. The energy expenditure value of traveling by car is 3.6 MJ/passenger-kilometer.

For 1 person making a trip of 1000 km, the total energy consumed is (3.6 MJ/passenger-kilometer) x (1000 km) = 3600 MJ.

Now, to find the number of gallons of gasoline required, we divide the total energy consumed by the energy content of a gallon of gasoline. Since a gallon of gasoline contains 120 MJ, the number of gallons required is 3600 MJ / 120 MJ = 30 gallons.

Therefore, the correct answer is c) 30 gallons.