Acontinuous-time sinusoid x(t) is sampled at 5000 hz, which is above the nyquist rate a section of 512 samples is extracted from the sampled signal x[n], for example, x[n] for 1001 < n < 1512 then a 512-point dft is computed. the resulting 512-point dft xk] is nonzero only for k = 100, and for k = 412. determine the frequency (in hz) of the continuous-time signal x(t) the answer should be a positive number, with 4 or more significant digits. you can use fixed or exponential notation (e. g., 1574.5 or 1.5745e3) frequency (hz) of x(t) insert a numerical answer

Line joining liquid phase with liquid and solid phase mixture is known as: a) liquidus b) solidus c) tie line d) none of the mentioned

The thermal expansion or contraction of a given metal is a function of the f a)-density b)-initial temperature c)- temperature difference d)- linear coefficient of thermal expansion e)- final temperature f)- original length

Tom is having a problem with his washing machine. he notices that the machine vibrates violently at a frequency of 1500 rpm due to an unknown rotating unbalance. the machine is mounted on 4 springs each having a stiffness of 10 kn/m. tom wishes to add an undamped vibration absorber attached by a spring under the machine the machine working frequency ranges between 800 rpm to 2000 rpm and its total mass while loaded is assumed to be 80 kg a) what should be the mass of the absorber added to the machine so that the natural frequency falls outside the working range? b) after a first trial of an absorber using a mass of 35 kg, the amplitude of the oscillation was found to be 10 cm. what is the value of the rotating unbalance? c) using me-3.5 kg.m, find the optimal absorber (by minimizing its mass). what would be the amplitude of the oscillation of the absorber?