A 1000 Kg turbine with a rotating unbalance at a distance of 1 m from the rotation axis. The turbine is placed on an isolator formed by springs and viscous dampers in parallel. When the frequency of the turbine is very large, the amplitude of the vibration is 0.05 mm. The maximum steady-state amplitude of 0.25 mm is observed when the operating frequency is 40 HZ. Which is the damping ratio of the turbine-isolator system

Which of the following is considered to be a vector?               a.  temperature    b.  velocity    c.  time    d.  mass

Samir watches a 100-minute movie on his spaceship. maria's spaceshipe flies in the same direction as samir's spaceship but she observes his move to last 125 minutes and his spaceship to be 40 m long. how long does samir observe his own spaceship to be? according to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does marias voyage take according to samir?

If a rock is thrown upward on the planet mars with a velocity of 12 m/s, its height (in meters) after t seconds is given by h = 12t − 1.86t2. (a) find the velocity of the rock after two seconds. m/s (b) find the velocity of the rock when t = a. 12−3.72a m/s (c) when will the rock hit the surface? (round your answer to one decimal place.) t = s (d) with what velocity will the rock hit the surface? m/s