Gold and silver are used to make coins and medals

Compare and contrast the bohr model and the electron cloud models of the atom.

1. list three scientific reasons cockroaches may fly.

Mike and mitchell decide to have a foot race. they mark off a stretch of 100 yards, and recruit cindy to work the stopwatch. after running the race and looking at the results, cindy declared that mitchell was the fastest. so how did the boys times compare?