Wind turbines can generate a great deal of electricity, and have become popular because there is no cost to use wind, wind turbines don't emit greenhouse gases and have several other benefits. a typical wind turbine has an efficiency of 30%, calculated as the amount of electrical energy generated divided by the maximum potential energy. what is the most likely source of "wasted" energy? a) nuclear b) thermal c) chemical d) potential

The climate of the continental united states is generally 1. tropical 2. temperate 3. arctic 4. highland

Why is the bond angle in a water molecule less than the bond angle of methane? a. the central oxygen atom in water has two lone pairs of electrons, whereas the central carbon atom in methane has no lone pairs. b. the central hydrogen atom in water has one lone pair of electrons, whereas the central carbon atom in methane has two lone pairs. c. the central oxygen atom in water has four lone pairs of electrons, whereas the central carbon atom in methane has only one lone pair. d. the central oxygen atom exerts more repulsive force on surrounding atoms than the central carbon atom in methane does. reset next

What human activity increases beach erosion?