Explanation:Simple machines are tools that make work easier by changing the direction of the applied force or by reducing the amount of input force needed.
Simple machines do not change the amount of energy needed to perform a certain task. For example, when an object is raised, this work can be made easier using a ramp (inclined plane). A ramp reduces the force needed to lift the object, but increases the distance over which the force is applied. So the amount of work, or energy, remains constant.
Simple machines are not made up of multiple moving parts, but they may be combined together to make compound machines.
The reason that it takes longer to get the water to boiling temperature than it is to cool it down again is because heating in the most simple sense is inefficient and will cause a lot if energy lost while cooling is to be turn's into quite a efficient process.
Self control involves individuals having a strong discipline towards certain conditions. The conditions could be cravings for something or other forms of activities.
Self control is usually developed by people who practice self-regulation through physical exercise and time-managed programs experience as they have been known to bring about an increase in it.