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What type of waves do you think sunscreen our skin from cancer from?
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How much work is done lifting a 9.10 kg box straight up onto a shelf that is 1.80 m high?
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What is the temperature in degrees celsius of a substance with a tempature of 49k
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The mass of the sun is 1.99×1030kg and its distance to the earth is 1.50×1011m. what is the gravitational force of the sun on the earth?
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What type of waves do you think sunscreen our skin from cancer from?...
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