Machinedesign 2165 Faucet Finish703 0 0
Machinedesign 2165 Faucet Finish703 0 0
Machinedesign 2165 Faucet Finish703 0 0
Machinedesign 2165 Faucet Finish703 0 0
Machinedesign 2165 Faucet Finish703 0 0

Fun With Fundamentals: Problem 270

July 1, 2003
You’ll need to go with the flow on this one.

Problem 270//Faucet finish

It’s the end of a long day, but Bernie Beaker has been given one last task by his boss, the venerable Professor Oltymer. The assigned task is to fill up a hundred 250-mL beakers with water to prepare for next morning’s science class. Once finished, he can head over to the annual Physics Department Fish Fry. Unfortunately, he only has 15 minutes before his wife Wanda is to pick him up for the event. He’s not sure if he can possibly do the job that quickly.

Bernie has the faucet open wide, and the cross sectional area near the mouth is 1.2 cm2. The stream of water narrows as it falls, and 45 mm lower, the cross section decreases to 0.35 cm2. At what rate is the water flowing, and how long it will take Bernie to fill up each 250 mL beaker? Will Wanda be waiting long? Assume surface tension is negligible – Bernie has enough to worry about!

Solution to problem 269, Grand math slam, June 2003:

Winners circle

Fun problem 268: Guzzlin’ grannies May 2003 Total entries: 64 Number correct: 8 (12.5%). The answer was 5.24 at 1.75; in the June issue, a typo in the solution reflected 1.05. Winner: Derek Koonce Derek’s prize:Inviting Disaster, Lessons from the Edge of Technology by James R. Chiles; Harper Business. Combining riveting storytelling with eye-opening findings, Inviting Disaster shows what happens when our reach for new technology exceeds our grasp, and explains what we need to know to survive on the machine frontier.

Related article

Fun With Fundamentals: Problem 269

Sponsored Recommendations

NEW Low Profile, Ultra Compact Power Supplies

March 13, 2024
Learn more HERE about Altech's Power supplies!

Altech's Liquid Tight Strain Relifs Catalog

March 13, 2024
With experienced Product Engineers and Customer Service personnel, Altech provides solutions to your most pressing application challenges. All with one thought in mind - to ensure...

Industrial Straight-Through Cable Gland

March 13, 2024
Learn more about Altech's cable glands and all they have to offer for your needs!

All-In-One DC-UPS Power Solutions

March 13, 2024
Introducing the All-In-One DC-UPS, a versatile solution combining multiple functionalities in a single device. Serving as a power supply, battery charger, battery care module,...

Voice your opinion!

To join the conversation, and become an exclusive member of Machine Design, create an account today!