A sheet of copper is 1 mm thick and has surface dimensions of 5 cm × 29 cm . If the long edges are joined to form a tube 29 cm in length, what is the resistance between the ends? The mass density of copper is 8920 kg/m3 and its resistivity is 1.7 × 10−8 Ω · m . Answer in units of Ω.

The table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

Nitric acid can be formed in two steps from the atmospheric gases nitrogen and oxygen, plus hydrogen prepared by reforming natural gas. in the first step, nitrogen and hydrogen react to form ammonia: (g) (g) (g) in the second step, ammonia and oxygen react to form nitric acid and water: (g) (g) (g) (g) calculate the net change in enthalpy for the formation of one mole of nitric acid from nitrogen, hydrogen and oxygen from these reactions. round your answer to the nearest .

Salt in oceans comes from and of rocks