Two tugboats are moving a barge. tugboat a pushes on the barge with a force of 3000n. tugboat b pulls with a force of 5000 newton's in the same direction. what is the combined force on the barge

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.