A thin-wall aluminum pop can is subjected to an internal pressure of 100 psi. The diameter and the wall thickness of the can are 2.5 inch and 0.004 inch respectively. The Young’s modulus and Poisson’s ratio for aluminum are

10 kg of co2 is initially contained at 400 kpa and 300 k. the gas constant for carbon dioxide is 189 j/lkg k) and has a specific heat ratio, k, of 1.289. isentropic expansion then occurs until the pressure is 200 kpa. a) determine the initial volume of co2 in m. b) determine the final temperature in k. c) determine the work done by the system during the expansion kl.

The sum of the normal stresses does not change as the stress state rotates through an angle. a)-trune b)- false

The short distance from the objective lens to the object causes problems at high magnification. which of the following is the most serious? a. cleaning the object surface b. positioning the object c. reflection from the object surface. d. illumination of the object