Concept explainers
Volcanic and other such activity at the mid-Athletic ridge extrudes material to fill the gap between separating tectonic plates associated with continental drift. The magnetization of rocks is found to reverse in a coordinated manner with distance from the ridge. What does this imply about the Earth's magnetic field and how could the knowledge of the spreading rate he used to give its historical record?
What does this imply about the Earth's magnetic field?
Answer to Problem 1CQ
It implies that there is no magnetic force at the center of the earth where molten metal is present, and also suggest that there is a strong magnetic field outside the earth under the influence of which the earth gets magnetize.
Explanation of Solution
When the molten lava comes out form the volcano, it gets solidifies into a rock and it get magnetize in the direction of the local magnetic field, and at the center of the lava there is no magnetic field.
Similarly, it indicates that when the earth is in molten state there is no magnetic field, but as it starts cooling the outer layer of the earth gets magnetize under the influence of strong magnetic field. It also implies that there is a strong magnetic field outside the earth due to which the earth gets magnetize at the North and the South Pole.
Conclusion:
It implies that there is no magnetic force at the center of the earth where molten metal is present, and also suggest that there is a strong magnetic field outside the earth under the influence of which the earth gets magnetize.
Want to see more full solutions like this?
Chapter 22 Solutions
College Physics
Additional Science Textbook Solutions
College Physics: A Strategic Approach (4th Edition)
Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (4th Edition)
Physics: Principles with Applications
College Physics: A Strategic Approach (3rd Edition)
Essential University Physics: Volume 2 (3rd Edition)
Physics for Scientists and Engineers: A Strategic Approach, Vol. 1 (Chs 1-21) (4th Edition)
- There are regions where the magnetic field of earth is almost perpendicular to the surface of Earth. What difficulty does this cause in the use of a compass?arrow_forwardAround the geographic North Pole (or magnetic South Pole), Earth’s magnetic field is almost vertical. If an airplane is flying northward in this region, which side of the wing is positively charged and which is negatively charged?arrow_forward(Indicates a review question, which means it requires only a basic understanding of the material to answer. Questions without this designation typically require integrating or extending the concepts presented thus far.) Describe the three basic interactions between electricity and magnetism.arrow_forward
- If a cosmic ray proton approaches the Earth from outer space along a line toward the center of the Earth that lies in the plane of the equator, in what direction will it be deflected by the Earth’s magnetic field? What about an electron? A neutron?arrow_forwardsome tools contain permant magnets . what two types of meterials would these tools pick up?arrow_forwardANSWER THIS QUESTIONS What is in ferrous material that causes it to heat up under a magnetic field? Proper Materials that satisfy the hysteresis and eddy current conditions (give at least 2 or 3 examples)arrow_forward
- Please help with question #5arrow_forwardA ferromagnetic core is shown in the figure. The depth of the core is 5cm. The other dimensions of the core are shown in the figure. Find the value of the current that will produce a flux of 0.005Wb. With this current, what is the magnetic field at the top of the core and at the right side of the core? Assume that the relative permeability of the core is 1000. |5 cm -10 cm 20 cm 15 cm 500 tums 15 cm 15 cm Core depth = 5 cmarrow_forwardGreen turtles use the earth’s magnetic field to navigate. They seem to use the field to tell them their latitude—how far north or south of the equator they are. Explain how knowing the direction of the earth’s field could give this information.arrow_forward
- The charged currents in the outer conducting regions of the earth’s core are thought to be responsible for earth’s magnetism. What might be the ‘battery’ (i.e., the source of energy) to sustain these currents?arrow_forwardCan you answer the question?arrow_forwardIn New Hampshire the average horizontal component of Earth’s magnetic field in 1912 was 16 mT, and the average inclination or “dip” was 73°.What was the corresponding magnitude of Earth’s magnetic field?arrow_forward
- College PhysicsPhysicsISBN:9781938168000Author:Paul Peter Urone, Roger HinrichsPublisher:OpenStax College
- Physics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage Learning