High‑speed ultracentrifuges are useful devices to sediment materials quickly or to separate materials. an ultracentrifuge spins a small tube in a circle of radius 13.1 cm at 5.0 rev/min. what is the centripetal force experienced by a sample that has a mass of 0.00310 kg?

For this car, predict the shape of a graph that shows distance (x) versus time (t). note that time is the independent variable and will be on the bottom axis. need asap

**urgent** roberto plans to use two transformers to reduce a voltage of 120 v to 4 v. he uses a transformer that has 300 coils in the primary winding and 50 coils in the secondary winding. he has four other transformers, as listed in the table. which transformer should roberto use to have an ending voltage of 4 v? a- w b-xc- yd- z

Match these items. 1. coulombs __force 2. ohms __emf 3. centimeters __resistance 4. newtons __charge 5. volts __length