One measure of the efficiency of a generator or power plant that converts a fuel into heat and into electricity is the heat rate. The heat rate is the amount of energy used by an electrical generator or power plant to generate one kilowatthour (kWh) of electricity. The U.S. Energy Information Administration (EIA) expresses heat rates in British thermal units (Btu) per net kWh generated.
The Constitution specifically grants Congress its most important power â the authority to make laws. A bill, or proposed law, only becomes a law after both the House of Representatives and the Senate have approved it in the same form.
The Constitution vests the President with Executive Power. That power reaches its zenith when wielded to protect national security. And federal courts in the United States must pay proper deference to the Executive in assessing the threats that face the nation.