A chef spins a disk of pizza dough over her head, giving it an angular speed of 7.0 rad/s. If the moment of inertia of the pizza dough is 6.3 ×10−6kg⋅m2, what is its rotational kinetic energy? (Assume that the disk of dough is uniform.)

3. a particle with initial velocity v⃗ 0=(5.85×103m/s)j^ enters a region of uniform electric and magnetic fields. the magnetic field in the region is b⃗ =−(1.35t)k^. you can ignore the weight of the particle. a. calculate the magnitude of the electric field in the region if the particle is to pass through undeflected, for a particle of charge +0.640 nc.