A chemical reaction is run in which 113 Joules of work is done by the system and the internal energy changes by -824 Joules. Calculate the change in the internal energy of the chemical system.

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?

Many ionic compounds and a few highly polar covalent compounds are because they completely ionize in water to create a solution filled with charged ions that can conduct an electric current.

Light waves travel than sound waves.