On Land, Coal Is Transported Primarily by Train

question 2

Essay

On land, coal is transported primarily by train. A typical large coal train may
be about 1.5 km long and may consist of 120 cars, each holding 110 tonnes of coal. As each tonne of coal has an equivalent energy content (in terms of the stored chemical energy it contains), a moving coal train represents a flow of (chemical) energy or a power. For acoal train traveling at 100 km/h, calculate the equivalent power in watts.

---

Definitions:

Bagels

Doughnut-shaped bread rolls that are boiled before being baked, often topped with seeds or filled with various ingredients.

Marginal Analysis

Analysis of the added value an activity provides compared to its additional expenses.

Economics Final

An examination or assessment concluding a course in economics, testing students' understanding of economic theories and principles.

Part-Time Job

Employment with fewer hours per week than a full-time position, typically offering more flexibility.