A 23.40 g sample of aluminum is heated from 28 oC to its melting point of 660 oC and then melted completely. How much energy was absorbed by the sample? (Answer in kJ) S=0.91 J/goC Delta Hf = 10.7 kJ/mol

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.

the cold front replaces the warmer air at the ground level changing the wind to be breezy and denser.there is also an immediate drop in the temperature.