Determine the density of 176.0 g cube with a side length of 21 cm in base S. I. units. Express your answer in scientific notation with the correct number of
significant digits.

If element x has 99 protons how many electrons does it have

Astep up transformer has 250 turns on its primary and 500 turns on it secondary. when the primary is connected to a 200 v and the secondary is connected to a floodlight that draws 5a, what is the power output? show all of your work.

An object with a mass of 1.5 kg changes its velocity from + 15 m/s to +22 m/s during a time interval of 3.5 seconds. what impulse was delivered to the objects?