Explore Categories
A clean flat air filter.

What is an Air Filter?

An air filter is part of a car's intake system. Essential for helping the engine work properly, a clogged air filter can cause...

Airships, like the non-rigid dirigibles that are often seen at sporting events, use helium, a gas that is lighter than air, to stay aloft.

What are Dirigibles?

A dirigible is a type of buoyant engine-powered craft with a steering mechanism. Also known as airships, dirigibles are often...

Popular Reads

Cutaway view of a transmission.

What is a Transmission?

A transmission is a mechanical device that allows power to be sent from a power source to a mechanism. In cars, the transmission...

An auto mechanic can perform regular car maintenance.

What is Vehicle Maintenance?

Vehicle maintenance is the process of servicing a vehicle on a regular basis to keep it from having a major breakdown or needing...

Now referred to as a "pilot", cow catchers on modern locomotives still act to clear small obstacles from the track.

What is a Cow Catcher?

A cow catcher is a device attached to the front of a train to clear obstacles from a track. In modern trains, the cow catcher...

The SUV is designed to travel off-road.

What is an SUV?

An SUV is a combination of a truck and a minivan. Though SUVs were originally designed as off-road vehicles, the SUV market has...

Subways typically run on electricity, which is provided through the "third rail."

What is a Subway?

A subway is a train system that operates entirely in underground tunnels. In most modern subway systems, the lines are arranged...

A sailboat is "tacking" when it is using a course that keeps reversing, or "zigzagging", to gradually move along a course that is against the wind.

In Sailing, what is Tacking?

Tacking is the practice of adjusting the sails to keep the bow turning through the wind and alternately filling the sails from one...

In drag races, two cars are pitted against one another and have a very short length of track to cover to see which has the superior acceleration ability.

What is Drag Racing?

Drag racing is a vehicle competition that uses straight, level, short quarter mile or half mile tracks. The way that a drag race...

WiseGeek Scholarships

Law Student.

WiseGeek Law No-Essay Scholarship

The amount of debt that most law students take on in getting a law degree can make it tough to start a career. The WiseGeek Law No-Essay Scholarship can help keep your student loans as low as possible.