An element has atomic number 10 and an atomic mass of 20. how many neutrons are in the atom of this element?
a. 10
b. 20
c. 30
d. 0
e. 200

** 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