HELP PLEASE Highlight the correct sentences. (hint there are 2 of each).

1. Jupiter is more dense than Earth because it is bigger.

2. A balloon is less dense than a basketball because it would have less mass if they were the same size.

3. If two items are the same size and have the same mass, then they have the same density.

4. Density has nothing to do with mass.

Suppose a wheel with a tire mounted on it is rotating at the constant rate of 2.15 times a second. a tack is stuck in the tire at a distance of 0.373 m from the rotation axis. noting that for every rotation the tack travels one circumference (a) find the tack's tangential speed. (b) what is the tacks radial acceleration?

Students in an introductory physics lab are performing an experiment with a parallel-plate capacitor made of two circular aluminum plates, each 11 cm in diameter, separated by 1.0 cm. how much charge can be added to each of the plates before a spark jumps between the two plates? for such flat electrodes, assume that value of 3×106n/c of the field causes a spark.

How do you know how many valence electrons an atom has?