What is the momentum (in kgm/s) of a skier that has a mass of 91 kg and a velocity of 11 m/s?

The image shows a pendulum in simple harmonic motion the pendulum starts at a and swing to e

Sort the images based on whether there's a force of attraction or repulsion between the magnets shown. attraction repulsion

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.