During the december summer holidays, the n3 from johannesburg to durban carries 30 000 cars per hour for 13 hours of daylight, (15 000 per hour each way) at an average speed of 120 kmh1. each vehicle emits 0.09 g. s1 of co. the wind speed during the day is 2 m. s1 and increases to 4 m. s1 when the sun sets. during the 11 hours of darkness, the traffic subsides and the number of cars decreases to 10 000 per hour (5 000 per hour each way). calculate the average co concentration experienced by people residing within 1 km of the highway during the day and at night. assume -the emissions from the vehicles occur at ground level -emissions occur at the centerline of the highway. - the concentration upwind of the highway is zero.

- "the acute form of diverticulitis can manifest itself with one or more severe attacks of infection and inflammation.

the inflammation of diverticulitis can eventually result in a bowel obstruction, which may cause constipation, thin stools, diarrhea, abdominal swelling or bloating, and abdominal pain."

"among the transition metal elements, manganese and zinc have a slight lowering of electronegativities. the reason behind this is that the nuclear charges of these elements are slightly weaker than the other transition metal elements due to the way their valence electrons are filled up. both manganese and zinc have their valence electrons filled up to the 4th shell with 1 pair of electrons (4s2) completely occupying it. although the electrons in the 3rd shell (3d) are yet to be paired since the outer most shell is filled up, the ability of the nucleus to attract electrons is lessened. hence,   the electronegativity (or the ability to attract electrons) is lessened."