2. A ball of mass 500 g is dropped from a height of 7 m and it bounces back to a height of 5 m after hitting the ground. a. Calculate the G. P.E before the ball before it hits the ground
b. Explain the energy transformation from when the ball is dropped till the ball hits the ground
c. Calculate the G. P.E after the ball bounces back.
d. How much energy is wasted?
At a certain height the reaches a velocity of 8 m/s before it hits the ground
e. Calculate the K. E.
f. Calculate the work done when the ball reaches that speed.

The dissociation energy of a molecule is the energy required tobreak apart the molecule into its separate atoms. the dissociationenergy for a particular molecule is 5.48 x 10-18 j. suppose that this energy is provided by a single photon. determinethe (a) wavelength and (b) frequency of the photon

Find the magnetic field a distance r from the center of a long wire that has radius a and carries a uniform current per unit area j in the positive z direction.

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?