alejandra1201
03.08.2019 •
Physics
Which of the following statements is true? a. the angle of refracted light is equal and opposite to the angle of incoming light. b. a magnetic field can be created by running an electric current through a magnet. c. exothermic chemical reactions absorb heat. d. velocity and temperature are scalar quantities.
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Ответ:
b
Explanation:
Ответ:
Explanation:
P.E=MGH
SO 100×40×40=160000