13. A converging lens has a focal point that is 6.0 cm from its center. If an observer looks through the
lens at an object 1.5 cm from the lens, what will the image look like? Is it real or virtual? Is it upright
or inverted? Is the image magnified, reduced, or essentially the same size as the object?

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