P14.003A spherical gas-storage tank with an inside diameter of 8.1 m is being constructed to store gas under an internal pressure of 1.26 MPa. The tank will be constructed from steel that has a yield strength of 270 MPa. If a factor of safety of 2.0 with respect to the yield strength is required, determine the minimum wall thickness tmin required for the spherical tank.

These models show the electron structures of two different nonmetal elements. which element is likely more reactive, and why? element 1 is more reactive because it has fewer electron shells and is toward the top of its group on the periodic table. element 1 is more reactive because it has more electrons in its valence shell and is farther to the right on the periodic table. element 2 is more reactive because it does not have a valence shell close to the nucleus, so it will attract electrons. element 2 is more reactive because it does not have a full valence shell, so it will attract electrons.

Assuming weightless pulleys and 100% efficiency, what is the minimum input force required to lift a 120 n weight using a single fixed pulley?

Atrain departs from its station at a constant acceleration of 5 m/s. what is the speed of the train at the end of 20s?