Acamera takes a properly exposed photo with a 4.0 mm diameter aperture and a shutter speed of 1/1000 s. if the photographer focuses on the same point, but changes the speed to 1/250 s. what needs to happen to the diameter of the aperture, if it is still properly exposed? a. nothing b. d' = 16 mm c. d'=1.0 mm d. d' = 8.0 mm e. d'=2.0 mm

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