What vertical launch speed is necessary to get a rocket to an altitude of 1500 km ?

How will the system respond to a temperature increase?

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

How do you know how many valence electrons an atom has?