Which of the following statements is the most accurate? a. energy transfers are never 100% efficient. b. energy transfer is completely efficient. c. energy cannot be transferred to other forms. d. energy transfers can be used to create perpetual-motion machines.

A.Energy transfers are never 100% efficient

Explanation:

According to the  first law of thermodynamics energy can neither be created nor destroyed but it can be converted from one form to another. According to the second law of thermodynamics transfer of energy is never 100% efficient in a machine. There is always loss of energy due to wear and tear of the machinery.

the answer is: they rebelled against saddam hussein’s rule.

kurds opposed saddam rule and wanted independence. kurds in the north and shiites in the south revolt against hussein.

for example, the halabja attack in 1988 conducted against the kurdish people by the iraqi regime under saddam hussein, where between 4000 people are killed and around 9000 are injured.

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.