What must occur within a magnetic material before it exhibts magnetic properties? a)The material must be of a specific size
b)The material must be charged with electricity
c) The magnetic domains inside the material must be aligned
d) The magnetic material must be created artificially

(real answers only or you will be reported. Thanks to those who help).

Match these items. 1. coulombs __force 2. ohms __emf 3. centimeters __resistance 4. newtons __charge 5. volts __length

What does si stand for,when referring to a system of measurement

Hydroelectricity provides about 7 percent of the electricity generated in the united states. (a) explain how a hydroelectric power plant converts energy stored in water into electricity. (b) identify two factors that determine the amount of electricity that can be generated by an individual hydroelectricity power plant. (c) describe the two main types of land-based hydroelectric power plants. (d) describe two economic advantages and two environmental disadvantages of hydroelectricity.