What might have caused the rabbit population shown in the graph below to increase less in the third year than in the previous two years? A graph with Years on the x-axis from 0 to 3 and Rabbits on the y-axis from 0 to 400, by hundreds. The line begins at 50, increases to near 150 at 1 year, increases to 250 at 2 years, ends at almost 300 at 3 years. a. an unusually cold winter the year before b. normal weather conditions c. habitat loss through urban sprawl d. habitat gain through urban sprawl Please select the best answer from the choices provided A B C D

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?