A 50-Kg Satellite Circles the Earth in an Orbit with a Period

question 40

Multiple Choice

A 50-kg satellite circles the Earth in an orbit with a period of 120 min. What minimum energy is required to change the orbit to another circular orbit with a period of 180 min? (Earth: radius = 6.4 × 10⁶ m, mass = 6.0 × 10²⁴ kg)

• A) 2.9 × 10⁸ J
• B) 3.5 × 10⁸ J
• C) 4.1 × 10⁸ J
• D) 4.7 × 10⁸ J
• E) 5.9 × 10⁸ J

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Definitions:

Direct Material Used

Direct material used involves the consumption of raw materials that are transformed into and directly identifiable with the finished product in the manufacturing process.

Variable Manuf. Overhead

Variable manufacturing overhead refers to the indirect costs that change with the level of production, such as utilities for the manufacturing plant.

Labour Efficiency Variance

The difference between the actual hours worked and the standard hours expected to produce a certain number of units, valued at the standard labor rate.

Direct Labour Cost

The wages and salaries paid to workers who are directly involved in the production of goods or services.