Directions: Read and understand the story very well. List down separately the substances and mixtures used in the story in the table below. Luis's classmates decided to work their project in the house. His Mom was worried about what to prepare for the snack and lunch. She thought to market food and buy groceries. In the grocery, she bought 1 liter of coke, biscuits and junk foods like chippy and tortillos. While doing their project, they were also eating Boy Bawang Mixed Nuts. His Mom bought chicken and vegetables in the market. She cooked chicken Inasal using Mama Sita's Inihaw Marinade made up of white vinegar, salt, garlic and pepper. In addition, she also cooked Pinakbet. To make the Pinakbet tastes delicious, she used Ginisa Mix as an enhancer. His Mom also prepared Macaroni Salad as dessert. The macaroni salad was sweetened using condensed milk and creamer. To complete the ingredients Kaong, Nata de Coco, Fruit Cocktail were used. After two hours, the table was ready for lunch. Everybody washed their hands with soap and water.
Pure Substances

Mixtures

most historians agree that gabriel mouton, the vicar of st. paul’s church in lyons, france, is the “founding father” of the metric system. he proposed a decimal system of measurement in 1670. mouton based it on the length of one minute of arc of a great circle of the earth (now called a nautical mile, 1852 meters). he also proposed the swing-length of a pendulum with a frequency of one beat per second as the unit of length (about 25 cm). a pendulum beating with this length would have been fairly easy to produce, thus facilitating the widespread distribution of uniform standards. over the years, his work was revised, improved, and extended by a number of french scientists.

the political sponsor of weights and measures reform in the french revolutionary national assembly was the bishop of autun, better known as talleyrand. under his auspices, the french academy appointed several committees to carry out the work of developing a usable system of weights and measures for france. one of the committees recommended a decimalized measurement system based upon a length equal to one ten-millionth of the length of a quadrant of the earth’s meridian (i.e., one ten-millionth of the distance between the equator and the north pole).

answer;

18.5 seconds

explanation;

velocity is distance covered per unit time; it is given by displacement divided by time.

thus; time = displacement/velocity

total time = total displacement/velocity

total distance = 5000 meters south

total time = 5000/4.5

                  = 1111.11 seconds

but; 1 minute = 60 sec

thus; 1111.11 /60

                = 18.51 seconds

thus; the time taken is 18.5 seconds