D is your answer as the sentence is in present tense.
The answer would be “The fiat system of currency was a great improvement over the commodity and representative systems of currency.” so the answer is (b.)
Catastrophe is known as the "scene of suffering"
Answer:
The relationship exists in the fact that calorimetry is a scientific method that aids the measurement of the heat transferred between two systems. Heat transfer is a term that describes the various ways heat is used and exchanged between systems.
Explanation:
Heat transfer refers to the exchange of heat between two physical bodies whereas, Calorimetry is a method of measuring the amount of heat transferred between two bodies. Calorimetry employs a system which is to be measured, as well as a means of feeding heat into the system or withdrawing heat from it.
The Calorimeter is calibrated so that an observer can take note of the changes that occur depending on the action done to the physical systems undergoing the reaction. A calorimeter is the medium through which the calorimetry is done. An example is the bomb calorimeter used for this purpose.
which word correctly completes the anology limestone rock and calcite: mineral
