An engineer is studying the mileage performance characteristics of five types of gasoline additives. in the road test he wishes to use cars as blocks; however, because of a time constraint, he must use an incomplete block design. he runs the balanced design with the five blocks that follow. analyze the data from this experiment (use α-0.05) and draw conclusions.

car

additive 1 2 3 4 5

1 17 14 13 12

2 14 14 13 10

3 12 13 12 9

4 13 11 11 12

5 11 12 10 8

When using the ohmmeter function of a digital multimeter, the leads are placed in what position relative to the component being tested? a. parallel b. control c. series d. line

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.

During a steady flow process, the change of energy with respect to time is zero. a)- true b)- false