Making a product more user-friendly based on the results of prototype tests is an example of input.

False

Explanation:

The input phase is characterized by providing the data that the computer will work on during processing to finally produce the output information. Making a product more user-friendly based on prototype test results is an example of output, because the act of providing the data to get the results of the prototype tests has already been done, ie the input phase happened during the tests.

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.

warm front forms when a moist, warm air mass slides up and over a cold air mass. as the warm air mass rises, it condenses into a broad area of clouds. a warm front brings gentle rain or light snow, followed by warmer, milder weather.

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