1. a 26 kg cannon ball is fired from a cannon with muzzle speed of 962 m/s at an angle of 19.2 ◦ with the horizontal. the acceleration of gravity is 9.8 m/s 2 . use conservation of mechanical energy to find the maximum height reached by first ball. answer in units of m.2. a second identical ball is fired at an angle of 144◦ . what is the total mechanical energy at the maximum height of the second ball. answer in units of j.

On a geologic map, if the contacts between sedimentary rock units form a bull’s-eye pattern of concentric circles, with the youngest unit in the center, the underlying structure is a(n)

The friction of the water on a boat produces an acceleration of -10. m/s2. if the boat is traveling at 30. m/s and the motor is shut off, how long it take the boat to slow down to 5.0 m/s?

7. see worksheet 1 for values of variables x1, x2 and x3 and answer the following questions: a. for each variable find the mean, median, coefficient of skewness, range and population standard deviation. b. compared to variable x1, how are the mean and median affected by extreme values (outliers) seen in x2 and x3. c. is the median or mean the better measure of location for x2 and x3? explain. d. explain the differences in the magnitudes of the skewness coefficients for the three variables. e. what is the relationship between the range and standard deviation looking across the three variables?