Heidi goes to Costa Rica on vacation and comes back home to Georgia with a tan. Tanning is considered
O a chemical property.
O a physical property.
O a chemical change.
O a physical change.

Joe shines white light into a bowl half full of water at an angle of incident of 27.5°. calculate the angle of refraction in the water given the indices of refraction for air and water are 1.00 and 1.36, respectively.

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?

What are four significant sources of ghgs that come from wostem washington?