A. with 90% confidence, it can be said that the sample proportion of adults who believe in ufos is between the endpoints of the given confidence interval. b. with 90% confidence, it can be said that the population proportion of adults who believe in ufos is between the endpoints of the given confidence interval. c. with 90% probability, the population proportion of adults who do not believe in ufos is between the endpoints of the given confidence interval. d. the endpoints of the given confidence interval shows that 90% of adults believe in ufos.

Aloaded platform of total mass 500 kg is supported by a dashpot and by a set of springs of effective stiffness 72 kn/m. it is observed that when the platform is depressed through a distance x = 12.5 cm below its equilibrium position and then released without any initial velocity; it reaches its equilibrium position in the shortest possible time without overshoot. find the position and velocity of the loaded platform 0.10 sec. after its release. if a further load of 400 kg is added to the platform, find, i) the frequency of damped vibrations, and i) the amplitude of vibration after 2 complete oscillations, given that the initial amplitude is 15 cm.

The higher the astm grain-size number, the coarser the grain is. a)-true b)-false

The drive force for diffusion is 7 fick's first law can be used to solve the non-steady state diffusion. a)-true b)-false