Obtain only the schrödinger radial equation solution for hydrogen atom , rn, l ®

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.

What is the measurement of how fast an object moves relative to a reference point?

Assume you measured the mass of the cart to be (500 ± 1) g and the mass of the additional mass you put on the cart to be (500 ± 1) g as well. since the scale you are using in the lab cannot measure objects heavier than 600g you will have to sum up individual pieces and propagate the error. so what would be the mass and the standard error of the cart and the mass