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Answer:
See the explanation below.
Explanation:
Work in physics is defined as the product of force by the distance that the body travels in the direction of the force.
It can be represented by means of the following equation.
where:
W = work [J]
F = force [N]
d = distance [m]
In the given example the work is zero since the tree does not move, therefore the bear exerts a force on the tree. But there is no talk of movement of the tree, therefore the work is zero.
The net change in their depth in feet = -296 6/7 .Earth’s magnetic field is generated in the fluid outer core by a self-exciting dynamo process.
<h3>What is earth's magnetic field?</h3>By means of a self-exciting dynamo mechanism, the fluid outer core of the Earth produces the magnetic field. The magnetic field is produced by electrical currents travelling through the slowly moving molten iron. The magnetic field that can be observed at the surface of the globe contains sources in the crust, ionosphere, and magnetosphere in addition to the Earth's core.
The geomagnetic field fluctuates on a variety of scales, and these variations are currently described in both the space and time domains, going from low- to high-frequency fluctuations. The last section explains how the Earth's magnetic field can be useful to modern society while also posing risks. However, techniques for monitoring the magnetic field are first outlined.
Hence, The net change in their depth in feet = -296 6/7 .Earth’s magnetic field is generated in the fluid outer core by a self-exciting dynamo process.
To learn more about earth's magnetic field, refer to
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