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

35) 98x98+2x100x2-4 is _____