I live in a block of flats, and there is a fire alarm system that runs into every flat. last night my friend pressed the alarm as he thought it was a light switch, and managed to reset it via the panel. expect it went off again this morning. i spoke to my land lord but they cant get hold of the fire alarm people because its the weekend. it wont reset, it keeps going off every few hours, and i feel awful as its sounding in all the flat! every time you try to reset it, its like its not acknowledging that you're pressing buttons. i think there is a yellow flashing thing on it as well, and i read somewhere this means a fault? is there anything i can do, i feel so awful! heeeeelp
When you approach a town in Portugal, there is a sign which reads Velocity Control Ahead (albeit not in English). In the town, there is a stoplight, even if there isn't a cross street (many towns in Portugal are along small roads, not at intersections of roads). If you approach the light within the speed limit, the light stays green and you can drive right through town. If you are driving too far above the speed limit (experience says about 5 mph or more) the light turns red and makes you stop. It then lets you sit there for about 20 seconds, and then the light turns green again and you are free to go. (They also have police, but I've never seen anyone pulled over for speeding in Portugal, and on the main highways high-speed driving is almost a blood sport. I've had people draft me at 120 as if we were running a NASCAR race)
I need help on my Biology Lab? Good luck. I'm glad I'm not you. Add a discussion of how acids and bases react in solution. In an aqueous solution, acids cause there to be an excess of H+ ions. In an aqueous solution, bases cause there to be an excess of OH- ions. If you drop both acid and base into the same aqueous solution, the H+ formed by the acid will react with the OH- formed by the base, making water H2O. The negative ion from the acid and the positive ion from the base will typically remain in solution, and you have a salt solution to the point that they're balanced. They may, though, form an ionic solid precipitate. - Add a discussion of how HCL and NaOH specifically react in solutions. Violently. Use dilute solutions, wear gloves and safety goggles, perform this with a big icewater bath. HCl + NaOH - H2O + Cl- + Na+ You end up with water being formed, and a salt. The salt solution is of NaCl which is table salt. Yum. - Add a discussion of how the needs of living tissues are threatened by excessively high or low pH levels. Do your own homework! Okay, the units of function within the cell are enzymes, which are proteins that catalyze chemical reactions. These enzymes have an optimal pH at which they work the best. Changes in pH away from the optimal will cause them not to work as well, as the excess of H+ or OH- interact with the protein. Extremes of pH will cause them to denature or lose the three-dimensional shape they need to work at all. - Add a discussion of how living tissues protect themselves from excessively high or low pH levels. You should know this one. Interstitial fluids and intracellular cytosol contain buffering agents. A buffer acts to keep the pH steady, reacting with either excess H+ or excess OH- if those happen to be present.
