Hydrothermal metamorphism is caused by a large-scale geological event happens under high temperature and high pressure is caused by friction from moving tectonic plates happens when hot water interacts with preexisting rock

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