Suppose that a substance in a beaker is heated over a burner in a science lab. Which observation would most likely indicate that a chemical change has occurred in the substance? If the substance is a liquid or solid, an increase in temperature would indicate a chemical change. If the substance is a liquid, a change of some of the liquid to gaseous form would indicate a chemical change. If the substance is a solid, a change of some of the solid to liquid form would indicate a chemical change. If the substance is a liquid or solid, production of an odor would indicate a chemical change.
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Physics, 21.06.2019 17:20
Explain why the aperture of the spherical mirror should be small compared to the radius of curvature of the mirror.
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Physics, 22.06.2019 15:30
At 20∘c, the hole in an aluminum ring is 2.800 cm in diameter. you need to slip this ring over a steel shaft that has a room-temperature diameter of 2.804 cm . 1. to what common temperature should the ring and the shaft be heated so that the ring will just fit onto the shaft? coefficients of linear thermal expansion of steel and aluminum are 12×10−6 k−1 and23×10−6 k−1 respectively.
Answers: 1
Physics, 22.06.2019 17:20
Select all the correct answers.which two statements are true? a moving magnetic field creates an electric field.a constant magnetic field creates an electric field.a constant electric field creates a magnetic field.a moving electric field creates a magnetic field.resetnext
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Suppose that a substance in a beaker is heated over a burner in a science lab. Which observation wou...
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