A mixture is a combination of two or more elements that can be separated using physical means such as filtration, evaporation,...etc
A mixture can be one of two types:
1- homogeneous mixture where you cannot identify the elements easily by the naked eye. Example is sugar and water mixture.
2- heterogeneous mixture where you can easily identify the elements through naled eye.
Example is mixture of rocks and sand.
Based on the above, you can easily infer that:
a heterogeneous mixture is a mixture in which the components retain their identity.
Answer:
C. Takes heat in, does work, and loses energy heat.
Explanation:
Heat engine is a system makes use of thermal energy (heat) to in order to do mechanical work.
This occurs by converting the heat into mechanical energy. This energy is then used to do work.
The key characteristic of a heat engine is that the substance with which work is done by, goes from a higher temperature to a lower temperature.
Hence, it loses heat as it does work.
The gas will remain a gas and the energy will be transformed into heat raising the temperature
(Some very rare exceptions might occur)
Answer:
C. Evaporating water from the container.
Explanation:
The concentration of solution changes when solvent or solute are added/removed from a solution.