In a closed system that has 45 J of mechanical energy, the gravitational potential energy of a ball rolling down an inclined plane decreases from 8 J to
5 J. How does the system's kinetic energy change if there is no friction??
O A. It increases from 45 J to 50 J.
B. It decreases from 40 J to 37 J.
O C. It decreases from 48 J to 43 J.
D. It increases from 37 J to 40 J.

Abowling ball rolling down the lane toward the pins has gravitational potential energy. a. no b. a lot of c. a little

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?

Use the ratio form of kepler’s third law, = , and the data provided to determine the time it takes mars to orbit the sun. round your answer to the nearest tenth. earth’s orbital period = 1.0 earth year earth’s distance from the sun = 1.0 au mars’s distance from the sun = 1.5 au it takes mars about ⇒ 1.8 earth years to orbit the sun.