Проверить прочность двутавра, Обьясните пожалуйжта как должна решить его

Aneutron and a proton combine to form a nucleus. why does the mass of the nucleus differ from the sum of the masses of the individual nucleons?

Which of the the following are examples of projectile motion of both projectile motion and two dimensional motion

Astep up transformer has 250 turns on its primary and 500 turns on it secondary. when the primary is connected to a 200 v and the secondary is connected to a floodlight that draws 5a, what is the power output? show all of your work.