Si la longitud de cada riel es de 5 metros y la temperatura cambia de 17°C a 32°C, determina la longitud final de cada riel y la separación mínima que debe existir entre ellos; considera que los rieles son de cobre​

What happens when chlorine reacts with bromine? a. electrons move from the chlorine atoms to the bromine atoms. b. electrons move from the bromine atoms to the chlorine atoms. c. electrons are shared between the chlorine atoms and the bromine atoms. d. electrons become delocalized among the atoms.

Oxygen and nutrients are moved through the body by the: a. circulatory system c. lymphatic system b. digestive system d. reproductive system

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.