Heat<span> can be transferred from one place to another by conduction </span>in <span>solids, convection of fluids like liquids or gases, and radiation. A </span>temperature<span> difference </span>in a system<span> causes </span>heat<span> to </span>move<span> from higher to lower temperatures</span>
They needed sober, responsible workers
A plague killing him and his two sons
<u>Answer:</u>
(B) “Production and demand decreased with increased oil usage”
This was one of the factors for the decrease in demand for coal.
<u>Explanation:</u>
In 1930s, during the Great Depression period, the market saw a massive decline in the production of coal and a small steady increase in that of oil. One of the major reasons was the availability and price of oil and other natural fuels. The supply rate was higher than the demand rate which kept the prices of oil and other natural fuels low. Cost of mining and producing coal was very high. Lower prices and increased production of oil helped the producers to gain profit. This is one of the factors that helped oil to succeed ahead of coal.
Congress wanted to eliminate the Black Codes, while Johnson did not
