Question

The energy expenditure value of traveling by car is 3.6 MJ/passenger-kilometer. The value for traveling by train is 1.1 MJ/passenger-kilometer. For one person making a trip of 1000 km, the train is

A. approximately 1/3 more efficient.
B. not at all more efficient.
C. approximately 2 times more efficient.
D. approximately 3 times more efficient.
E. approximately 30 times more efficient.

Answer 1

The train is approximately 3 times more efficient than the car for a trip of 1000 km.

Step-by-step explanation:

To determine the efficiency of traveling by car versus train for a trip of 1000 km, we need to compare the energy expenditure values of each mode of transportation. The energy expenditure value for traveling by car is 3.6 MJ/passenger-kilometer, while the value for traveling by train is 1.1 MJ/passenger-kilometer. To find the efficiency, we can compare the energy expenditure values directly.

The energy expenditure for a car trip of 1000 km would be 3.6 MJ/passenger-kilometer * 1000 km = 3600 MJ. For the train, the energy expenditure would be 1.1 MJ/passenger-kilometer * 1000 km = 1100 MJ.

Therefore, the train is approximately 3 times more efficient than the car for a trip of 1000 km.