A rod made of 60-40 brass is sliding over unlubricated hardened tool steel with a load of 320 N. The hardness of brass is 520 MN/m2. The wear co-efficient is 10-3. Find: a. The distance traveled to produce a wear of volume of 0.01 mm3 by the adhesive wear of the brass rod. b. The distance traveled, if additional load of 0.0069 kN is applied and a wear volume 7 mm3

An engine, weighing 3000 n, is supported on a pedestal mount. it has been observed that the engine induces vibration into the surrounding area through its pedestal at the maximum operating speed. determine the stiffness of the dynamic vibration absorber spring in (n/m) that will reduce the vibration when mounted on the pedestal. the magnitude of the exciting force is 250 n, and the amplitude of motion of the auxiliary mass is to be limited to 2 mm note: in this question type-in right numbers, no decimals, no fractions, no unit. approximate to right number if needed

Determine the stoichiometric and actual air-fuel ratios and the mole flue gas composition for combustion with 15% excess air for raw indiana, pennsylvania raw coal.

List 3 options on how to reduce knocking problens during engine process,