What are the strengthening mechanisms commonly used in engineering materials? describe and explain each mechanism concisely. use sketches as needed elaborating on your answer (ii) why are ceramics brittle while metals are ductile? explain by using the peierls-nabarro equation (iii) why does dislocation slip occur on closed packed planes and close packed directions? explain by using the peierls- nabarro equation (iv) why are polycrystalline solids more advantageous than single crystals in the context of plastic deformation at ambient temperatures? explain by using the schmid's law

How many neutrons does element x have if it’s stormy umber is 33 and it’s mass number is 95?

Immediately upon reaching its lowest point, a falling pendulum bob has its greatest amount of energy, which is the initial amount of potential energy. a. heat; less than b. heat; more than c. kinetic; less than d. kinetic; more than

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?