10. A neutral electroscope was charged to acquire a net charge of – 4.80 x 10^-15 C. a. Explain if the electroscope gained or lost electrons.
b. How many electrons were transferred to charge the electroscope?

In positive numbers less than 1, the zeros between the decimal point and a non-zero number are blank significant

If an astronaut takes an object to the moon the following is true (choose only one). a the mass will change but the weight will be the same. b both the mass and the weight of the object will be the same. c the weight will change but the mass will be the same. d both the mass and the weight of the object will change.

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