Mercury Rotates Once in 59 Days with Respect to the Distant

question 122

Multiple Choice

Mercury rotates once in 59 days with respect to the distant stars and has a sidereal period of 88 days. If a star is seen to be overhead to an observer on Mercury at midnight on a particular day, how many times will Mercury orbit the Sun before this star is again above the observer's head in a nighttime sky?

• A) 3 times
• B) twice
• C) It will never again reach this specific position.
• D) once

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Definitions:

Modulator Pressure

The pressure within an automatic transmission's hydraulic system that helps control shifting by modulating the engagement of clutches and brake bands.

Running Conditions

The operational state of a machine, vehicle, or system under normal, intended use.

Engine Rpm

Engine revolutions per minute (RPM) measures how many times the engine's crankshaft completes a full rotation each minute, indicating the engine's operational speed.

Allison Transmission

A brand known for producing automatic transmissions for heavy-duty vehicles, offering durability and reliability in various applications.