Gravitational Acceleration Variations
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Questions and Answers

What is the main cause of instrument drift in gravimeters?

  • Gravitational attraction of the sun and moon
  • Variations in the Earth's magnetic field
  • Changes in the response of the gravimeter over time (correct)
  • Changes in the Earth's gravitational acceleration

    • What is the precision of modern gravimeters in measuring changes in the Earth's gravitational acceleration?

  • 1 part in 10 million
  • 1 part in 1 million
  • 1 part in 1000 million (correct)
  • 1 part in 100 million

    • Which of the following is an example of a spatial based variation?

  • Instrument drift
  • Variations in the Earth's magnetic field
  • Changes in the Earth's gravitational acceleration (correct)
  • Tidal effects

    • What is the unit of measurement for gravitational acceleration?

    <p>cm/sec²</p> Signup and view all the answers

    What is the main cause of tidal effects in gravimeters?

    <p>Gravitational attraction of the sun and moon</p> Signup and view all the answers

    What is the purpose of a gravimeter?

    <p>To measure the Earth's gravitational acceleration</p> Signup and view all the answers

    Which of the following manufacturers produces beam Instruments?

    <p>All of the above</p> Signup and view all the answers

    What is the accuracy required for gravitational acceleration measurements?

    <p>0.1 mgal</p> Signup and view all the answers

    What is the main advantage of modern gravimeters?

    <p>Capability to measure changes in gravitational acceleration with high precision</p> Signup and view all the answers

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