Adog is chasing a cat toward a tree the cat has a 10 yard lead and runs at a speed of 6 yards per second. the dog runs at a speed of 8 yards per second. the tree is 30 yards away from the dog starting position. which animal will reach the tree first

a cold ice-tea.

pour in room temperature or cold water. cover the pitcher and refrigerate. steep white or green tea for 6 to 8 hours; steep black or oolong tea for 8 to 12 hours.jun 28, 2015

snell's law

refractve index = sin incidence / sin refraction

the doppler effect is used by weather forecasters to measure 

moving clouds