H.W.10// Is the gauge pressure at the center of the pipe (a) negative, (b) zero, or (c) positive? Neglect surface ension effects and state your rationale. Specific gravity = 1.00 6 in 30 in 12 in Specific gravity = 2.00

Problem 4: Determine the volume and the surface area of the solid obtained by rotating the area about (a) the x axis, (b) the vertical line at x = 16 in. T 6 in. -8 in. + -16 in. 12 in.

A spherical balloon with an outer diameter of 490 mm and thickness 0.3 mm is filled with a gas. Calculate maximum permissible pressure (in kPa) in the balloon if the allowable normal strain at the outer surface of the balloon is 0.1. Assume E = 4 MPa and v = 0.47. (Assume that the given radius or diameter is an inside dimension and that all internal pressures are gage pressures.) kPa

0.5 in. | 105 in. A 2 ft The A-36 steel bar shown in the figure is constrained to just fit between two fixed supports when T1=60°F. If the temperature is raised to T1=120°F, determine the average normal thermal stress developed in the bar. B