It is reasonable to expect that given growing wealth, the emergence of a middle class, access to modern conveniences, and so forth, the ‘emerging’ countries of the world may experience exponential growth in energy consumption over the short to medium term. from data introduced earlier, these countries consumed 136 ej of energy in 1990 and 198 ej in 2004. use these data points and the exponential curve to predict energy consumption in 2020. discuss the implications of this prediction.

Coiled springs ought to be very strong and stiff. si3n4 is a strong, stiff material. would you select this material for a spring? explain.

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

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