Adisk rotates around an axis through its center that is perpendicular to the plane of the disk. the disk has a line drawn on it that extends from the axis of the disk to the rim. at t = 0 this line lies along the x-axis and the disk is rotating with positive angular velocity ω0z. the disk has constant positive angular acceleration αz. at what time after t = 0 has the line on the disk rotated through an angle θ?

express your answer in terms of the variables ω0z, αz, and θ.

In positive numbers less than 1, the zeros between the decimal point and a non-zero number are blank significant

Electromagnetic induction. a coil of wire contains n turns and has an electrical resistance r. the radius of each turn is a. initially, inside the coil there exists a uniform magnetic field of magnitude b0 parallel to the axis of the coil. the magnetic field is then reduced slowly. the current induced in the coil is i. how long does it take for the magnitude of the uniform field to drop to zero?

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?