Your older brother has been dealing in gold business brings to you a cube of a<br />stone of uniform sides and claims its gold. Having studied density, explain stating<br />all the instruments involved how you can affirm that the stone is gold.

The basketball coach tells his team to run sprints back and forth across the court, which is 30 m long. they start at the left end of the court, run back and forth 6 times, then end back at the left end of the court where they began. what distance did they run? what is their displacement?