Answer:
Most revolutions start because a certain group finds something unjust. For example, the French revolution basically started because the French people believed their government to be unjust. So, for a revolution to be a success would be for that particular group to change what they saw as wrong.
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Explanation:
85% efficiency of simple machine means that with 100% input, the machine will give a work output of 85%. EXPLANATION: The efficiency of a machine is the ratio of its Mechanical Advantage to its Velocity
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