As you heat a piece of wood on a fire, the temperature of the wood increases. What does this tell you? A. The molecules in the wood are vibrating faster. B. The molecules in the wood are vibrating more slowly. C. The total thermal energy of the wood is decreasing. D. The chemical energy of the wood is increasing.

Aremote community desperately needs more electrical energy. it is located in an area with the following characteristics: average wind speed of 15 – 20 km/hr some medium-sized rivers with slow-moving currents few coal deposits some oil exploration being conducted within 400 miles based on the above information, which energy source would be the most economical and safest for the community to pursue? a. fossil fuel b. hydroelectric c. nuclear d. wind