well power is equal to work multiplied by time so .. 900j divided by 15 s will give you 60 Watt as your answer
Answer: positive feedback loops enhance or amplify changes. this tends to move a system away from its equilibrium state and make it more unstable. Negative feedbacks tend to dampen or buffer changes. this tends to hold a system to some equilibrium state making it more stable.
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it lets the defuse faster, which allowed communication to go by in a quickly manner
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The answer is G
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This is because cells cannot just appear out of thin air all cells have to have come from pre-existing cells.