A senstive computer is being transported in a boxcar. Accelerometer measurements tell us that at its normal speed, the foremost component of the boxcar's vertical acceleration is 10 m/s^2 at a frequency of 30 rad/sec. The crate in which the vase is being transported is tied to the floor of the boxcar. What is the required frequency ratio of an isolator with a damping ratio of 0.1 such that the acceleration amplitude of the 15 kg vase is less than 0.5 m/s^2

Two conductors, a and b, are each in the shape of a tetrahedron. but of different sizes. they are charged in the following manner: 1. tetrahedron a is charged from an electrostatic generator to charge q. 2. tetrahedron a is briefly touched to tetrahedron b. 3. steps 1 and 2 are repeated until the charge on tetrahedron b reaches a maximum value. if the charge on tetrahedron b was q/4 after the first time it touched tetrahedron a. what is the final charge qbmax on tetrahedron b?