Asmall electric immersion heater is used to heat . calculate the time required to bring all this water from 20°c to 100°c, ignoring any heat losses. (the specific heat of water is 4186 j/kg·k.)

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.