30) Centre of a circle is (2, -3), one end point of a diameter is (-3, 2), the coordinate of the other end point is

31) When two springs with stiffness k are in series, their equivalent stiffness will be

32) 18/8 stainless steel refers to stainless steel grade with composition

33) For a lightly damped vibrating system executing steady state forced vibration, the phase lag of displacement with respect to force at resonance is

34) The ratio of volume to surface area of a solid semi sphere is related to its radius through