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What is the acceleration of a spaceship that is initially at rest and then speeds up to 220 m/s in 20 seconds

Determine the change in width a, height b, thickness t when a plate is subjected to the uniform distributed load and is made of material having modulus of elasticity e=230 gpa and poisson's ratio ν=1/3. given : a=400 mm and b= 300 mm also the uniformly distributed load in downward y direction of plate is 2 mn/m and in the positive x direction is 3 mn/m and t=20 mm

If an electric circuit is not grounded it is best to reach out and touch it to provide the ground a.true or b.false