On a map showing temperature distributions, the lines that connect points of equal or same temperature are called isotherm. These are also known as contour lines and are usually presented based on a given date or time on a geographic map.
Answer:
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Explanation:
A scalar quantity is defined as the physical quantity that has only magnitude, for example, mass and electric charge. On the other hand, a vector quantity is defined as the physical quantity that has both magnitude as well as direction like force and weight. The other way of differentiating these two quantities is by using a notation.
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Answer:
The electromagnetic field propagates at the speed of light (in fact, this field can be identified as light) and interacts with charges and currents.
Explanation:The electric field is produced by stationary charges, and the magnetic field by moving charges (currents); these two are often described as the sources of the field.