Difference between Bell and clothes iron?

Which property of fossils allow scientists to determine the relative rock ages..

What is the acceleration of a spaceship that is initially at rest and then speeds up to 220 m/s in 20 seconds

** urgent** the voltage across the primary winding is 350,000 v, and the voltage across the secondary winding is 17,500 v. if the secondary winding has 600 coils, how many coils are in the primary winding? a- 30 coilsb- 583 coilsc- 12,000 coilsd- 332,500 coils