2023-11-20 09:44:30
Green, green river
Green, green river

During the St. Patrick's Day parade in Chicago, the local plumbers union dyes the Chicago River emerald green.
Students learn what PPM (parts per million) means and attempt to figure out how much dye is used to sufficiently color the river.
Comments (0)
Display 1 - 10 Of total 0
Fantasy Football (2025)
We're at the midway point of the 2025 NFL se...
Is this possible?
Brian Shoemaker, a Newton, MA mathematic...
Ulmer Nest
🏠In this activity,...
The Most Expensive 30 Seconds
This year, the 30-second Super Bowl ads will...
How steep is this treadmill?
Every year, even older students still ...
Bowling Deals
Is there a general way to figure how much it...
Triple Crown hopefuls at the Preakness
Credit: AP Photo/Garry Jones Saturday, ...
How many feet of lights should I buy for my tree?
Check out our Christ...
Tornadoes 2019
Tornadoes have devastated the Midwest, U.S. in t...
A gorgeous, glittery card
Uh oh! How do ...