What would refract the most? air, water, or glass?

Which best explains why an iceberg floats?

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?

Which symbol can be used to indicate the pressure at which a chemical reaction is carried out? 25°c 2 atm pa