An object of mass 4 Kg starts at the origin in xy-plane with initial velocityvector,( 0 )1, 1, 1v=<>. A force of magnitude 20 N acts directly upward from the xy-plane underneath the object, while gravitational force acts downward on the object. The magnitude of gravitational acceleration210 m/sg≈. Find, (i) the velocity()vtand the position function ()rtof this object, (ii) the time it lands on ground, and (iii) the coordinates of its landing.

For a science project, a high school research team conducted a survey of local air temperatures. based on the results of the survey, the found that the average temperatures were around 10 degrees higher than expected. this result was wrong. the trouble with the survey was that most of the locations were exposed to direct sunlight and located over asphalt or sand, which resulted in higher temperatures than normal. this is a classic example of an error in which phase of inferential statistics?