« previous next »

Author Question: Magnetic reversals of the Earth's field have occurred on the average every 200,000 years over the ... (Read 53 times)

plus1

  • Hero Member
  • *****
  • Posts: 676
on: Jul 28, 2018
Magnetic reversals of the Earth's field have occurred on the average every 200,000 years over the past 5 million years. When was the last magnetic reversal?
 a. about 200,000 years ago
  c. about 990,000 years ago
  b. 1792
  d. about 780,000 years ago

Question 2

If one could transport a simple pendulum of constant length from the Earth's surface to the Moon's, where the acceleration due to gravity is one-sixth (1/6) that on the Earth, by what factor would the pendulum frequency be changed?
 a. about 6.0
  c. about 0.41
  b. about 2.5
  d. about 0.17


mtmmmmmk

  • Sr. Member
  • ****
  • Posts: 335
Reply #1 on: Jul 28, 2018
Answer to Question 1

D

Answer to Question 2

C


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

The average person is easily confused by the terms pharmaceutics and pharmacology, thinking they are one and the same. Whereas pharmaceutics is the science of preparing and dispensing drugs (otherwise known as the science of pharmacy), pharmacology is the study of medications.

Did you know?

Approximately one in four people diagnosed with diabetes will develop foot problems. Of these, about one-third will require lower extremity amputation.

Did you know?

Eat fiber! A diet high in fiber can help lower cholesterol levels by as much as 10%.

Did you know?

During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).

Did you know?

Certain chemicals, after ingestion, can be converted by the body into cyanide. Most of these chemicals have been removed from the market, but some old nail polish remover, solvents, and plastics manufacturing solutions can contain these substances.

The proportion of obese and extremely obese adults in the United States has increased over the past The proportion of obese and extremely obese adults in the United States has increased over the past
“Mission Accomplished” proclaimed the banner on the USS Abraham Lincoln, where on May 1, 2003, Presi “Mission Accomplished” proclaimed the banner on the USS Abraham Lincoln, where on May 1, 2003, Presi
Earth’s orientation Earth’s orientation
Earth’s Heat Budget Earth’s Heat Budget
How Does Earth Work? Physical Geology and the Process of Science, 2nd Edition How Does Earth Work? Physical Geology and the Process of Science, 2nd Edition
Formation of the Early Earth Formation of the Early Earth
Video: Hierarchical Sequencing Method - Sequence Tagged Sites

For a complete list of videos, visit our video library