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Spend time observing or thinking about events that involve matter and energy. which events can you explain? which events can’t you explain?
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A20 cm long spring is attached to a wall. the spring stretches to a length of 22 cm when you pull on it with a force of 100 n. what is the spring constant
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When the polarity of the sun's magnetic field is taken into account, the solar activity cycle lasts...
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