An electric space heater in a home receives 1500 w of electrical power and uses this to heat the room air. the room air loses the same amount of heat through walls/windows to the colder outside air so that the room is maintained at a constant temperature. specify at least 3 specific locations/processes where entropy is generated in this system. use bullet points, but be specific ("in the room air" is not specific enough).

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.

gasoline is a mixture. it contains several different kinds of compounds that can be present in a variety of ratios.