Ask An Engineer

Why do submarines move more like torpedoes than fish?
Why do submarines move more like torpedoes than fish?

While a fish’s low-drag scales and body shape make it better suited at sliding through the water than submarines, fish do not have the advantage of a rotating machine behind them…

Is corn the best source for ethanol?
Is corn the best source for ethanol?

Corn is better used for re-fueling people and animals than cars and trucks…

What is “clean” coal?
What is “clean” coal?

“Clean” coal does not mean running the black sooty stuff through the washer. The phrase refers to technologies that mitigate or avoid pollutants or CO2 emissions generated by converting coal for electric energy…

Why can’t fusion energy solve the global energy crisis?
Why can’t fusion energy solve the global energy crisis?

Fusion energy may one day turn a pickup-truck-full of seawater into enough electricity to power Boston for a year, but not yet…

What is the energy of gasoline compared to the same cost of other fuels in BTUs per dollar?
What is the energy of gasoline compared to the same cost of other fuels in BTUs per dollar?

Of natural gas, fuel oil, and electricity, natural gas takes the prize right now as cheapest energy source…

How does an airplane stop on a runway after landing?
How does an airplane stop on a runway after landing?

When a Boeing 777 comes barrelling down the runway at 150-plus mph, it sometimes feels to its passengers like the plane is struggling mightily to stop. That’s only because it is…

How does a particle accelerator work, and why are such large structures necessary?
How does a particle accelerator work, and why are such large structures necessary?

Modern particle accelerators are either linear, where the particles are accelerated in a straight line, or circular, such as the Large Hadron Collider (LHC) that just started operating at CERN…

popupimg
content Link link