Which indicates that light travels in straight lines?
A. Color
B. Pigments
C. Shadows<...
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Simple machines can a. increase force only b. decrease force only c. increase or decrease force
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Which of the following are guidelines to follow for obtaining accurate observations
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Matter is needed to transfer thermal energy bya. conductionb. convectionc. radiation d. both a & b.
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How many neutrons does element x if it’s atomic number is 28 and its mass number is 87
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