Spaceman Speff Orbits Planet X with His Spaceship

question 57

Multiple Choice

Spaceman Speff orbits planet X with his spaceship.To remain in orbit at 421 km from the planet's center,he should maintain a speed of 80 m/s.What is the mass of planet X?

• A)4.0 × 10¹⁹ kg
• B)5.1 × 10¹⁷ kg
• C)4.0 × 10¹⁶ kg
• D)5.1 × 10¹⁴ kg

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Definitions:

Variable Costs

Expenses that change in proportion to the activity of a business such as costs for raw material which increase as production increases.

After-Tax Salvage

The net value gained from selling an asset after accounting for taxes on the sale.

Marginal Tax Rate

The tax rate applicable to the last dollar of the taxpayer's income, influencing financial decision-making and planning.