What do you think a mutation is?

Frictional forces acting on an object are often converted into energy, which causes the temperature of the object to rise slightly.

Why are pipes bursting in the in extremely cold weather?

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?