Water flowing at a rate of 0.667 kg/s enters a countercurrent heat exchanger at 308 k and is heated by an oil stream entering at 383 k at a rate of 2.85 kg/s (c) = 1.89 kj/kg-k). the overall u = 300 w/m²-k and the area is 15.0 m². a. what is the heat transfer effectiveness? b. what is the heat transfer rate

One way in which the useful metal copper is produced is by dissolving the mineral azurite, which contains copper(ii) carbonate, in concentrated sulfuric acid. the sulfuric acid reacts with the copper(ii) carbonate to produce a blue solution of copper(ii) sulfate. scrap iron is then added to this solution, and pure copper metal precipitates out because of the following chemical reaction: (s) (aq) (s) (aq) suppose an industrial quality-control chemist analyzes a sample from a copper processing plant in the following way. he adds powdered iron to a copper(ii) sulfate sample from the plant until no more copper will precipitate. he then washes, dries, and weighs the precipitate, and finds that it has a mass of .

Pls ill give u brainliest which of the following is true about science? 1. political conditions are unable to influence it. 2. economic concerns may prevent it from solving problems.

Which scientists contributed to the determination of how cfcs in clouds in the upper atmosphere could destroy ozone molecules