✌✌✌problem from quantum mechanics

solve it if you can

I am in 10th grade and i can solve whole quantum mechanics

##Indian education system

The magnetic field inside a superconducting solenoid is 4.50 t. the solenoid has an inner diameter of 6.20 cm and a length of 26.0 cm. determine (a) the magnetic energy density in the field and (b) the energy stored in the magnetic field within the solenoid.

A17,250 kg rocket is pushed with a thrust of 6,450,284 n. what is the acceleration of the rocket?

If element x has 99 protons how many electrons does it have