A student analyzed iwo diagrams of a nitrogen atom. Both diagrams showed seven protons in the nucleus, but the number of neutrons differed What are the two nitrogen atoms?
A electrons
B isotopes
C covalent bonds
D ionic bonds

Describe uniform velocity and variable velocity in short

Which is special about a dc circuit ? a. it has both series and parallel components b. it has only series or only parallel components c. charge moves in a single direction d. charge moves back and forth quickly

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