A4.2 kg parachutist is moving straight downward with a speed of 3.85 m/s

Ineed extreme for task 2. my student number is 571721. many to whoever solves this correctly, im in debt to you.

Protons and neutrons are found within the nucleus of an atom

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