Avehicle is moving at a velocity, v, given by v =12t - 3t2 ms-1. use
calculus to produce an equation for the acceleration of the
vehicle and find the value of acceleration at t = 3s

Calculate the bore of a cylinder that has a stroke of 18 inches and an extension time of 6 seconds at a flow rate of 4 gal/min.

What is creep? what is stress relaxation?

A)-explain briefly the importance of standards in engineering design. b)- what is patent? c)-explain the relationship between these standards: b. s. and b. s.en d)- in engineering design concepts, types of loads and how they act are important factors. explain.