Category:Challenge Questions

September 3rd, 2012

Challenge Question: Specific Heats [Solved]

By Kilean Lucas | Comments (3)
Snowy sidewalk SOLVED

So, are the heated sidewalks a good choice for the snowy Montana town? Check out the solution, provided by Vinith Bejugam of the University of Arkansas.

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July 18th, 2012

Challenge Question on Hydrostatic Pressure! [Challenged Solved]

By Kylie Canales | Comments (2)

Congratulations to Scott Kolodziej for being the first to submit a correct answer to the challenge question! And thanks to everyone who participated.

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November 17th, 2011

How Fast Does the Siphon Flow? [Challenge Solved]

By Kylie Canales | Comments (0)

With gas prices soaring, several friends decide to save money by siphoning gas from other people’s vehicles. They need to siphon 40L of gas in order for the group to have enough for their mopeds for the week. Sunday night, they were siphoning gas out of a large truck at the local market.

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October 12th, 2010

What rate is needed for turbulent flow? [Challenge Solved]

By Kendall Fosse | Comments (2)

Given a tubular membrane 4 inches in diameter what flow rate is needed
for turbulent flow?
See Answer Below.


A desalinization plant has upgraded to a new micro filtration system as part of its pretreatment of sea water.
The new system uses a tubular membrane, four inches in diameter.
Turbulent flow conditions must exist within […]

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September 2nd, 2010

Can You Help Save Paul Newman’s life? [Challenge Solved]

By Kendall Fosse | Comments (0)
swimming pool

In the movie “The Drowning Pool”, private detective Lew Harper (payed by Paul Newman) is trapped by the bad guy in a room containing a swimming pool.

This challenge is solved. See the solution below…

The room may be considered rectangular, 5 meters wide by 15 meters long, with a skylight window […]

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August 4th, 2010

When Coffee Novels and Chemicals Collide [Challenge Solved]

By Kendall Fosse | Comments (1)

Challenge Solved (See Answer Below)

Things were going smoothly at the Breaux Bridge Drug Co. pilot plant during the midnight to 8 a.m. shift until Therese Lagniappe, the reactor operator, let the run instruction sheet get too close to the Coleman stove that was being used to heat water to prepare […]

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July 7th, 2010

The Mystery Cylinder [Challenge Solved]

By Kendall Fosse | Comments (4)

CHALLENGE SOLVED: (See the Answer Below!)
Can you identify the mystery gas?
The label has come off a cylinder of gas in your laboratory. You know only that one species of gas is contained in the cylinder, but you do not know whether it is hydrogen, oxygen or nitrogen.

To find out, you […]

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April 29th, 2010

Why Knights Should Have Been Trained in Heat and Mass Transfer [Solved]

By Kendall Fosse | Comments (1)
Hot Dragon Breath[caption id="attachment_1249" align="alignleft" width="200" caption="Hot Dragon Breath"][/caption]
CHALLENGE QUESTION: (See the Answer Below!)
How long could a knight survive against a fire-breathing dragon?

As a knight you do this all the time, fight dragons that is. But finding yourself engulfed in a dragons fiery breath, you are beginning to question that career move. […] Read the rest of this entry »

March 12th, 2010

Can the hydraulic system you designed power a gurney through Guatemala?

By admin | Comments (2)

Challenge Question:
What is the viscosity of hydraulic fluid with a kinematic viscosity index of 300 and that is exposed to a temperature of 50 degrees Farhenheit?

You and your team are creating an adjustable hospital gurney to be used in a medical clinic in Guatemala. The gurney can be raised or […]

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