Search Results | per

Your search for "per" returned 4,864 results

How do you build an underwater tunnel?

science.howstuffworks.com/engineering/structural/build-underwater-tunnel.htm

Underwater tunnels are so commonplace that we rarely think of the great dangers -- and extreme construction techniques -- these modern wonders require. With the opening of the Marmaray Tunnel in October 2013, it's time to take a second look.

How Carbon-neutral E-fuels Work

auto.howstuffworks.com/fuel-efficiency/alternative-fuels/carbon-neutral-e-fuel.htm

Do you know How Carbon-neutral E-fuels Work? Keep reading to learn about zero-emission vehicles and discover how carbon-neutral e-fuels work.

10 Disadvantages of Biofuels

auto.howstuffworks.com/fuel-efficiency/biofuels/10-disadvantages-of-biofuels.htm

Biofuels are hot now, but integrating them into our fuel use habits could be costly. Read more about 10 disadvantages of biofuels.

1981 Baseball Season

entertainment.howstuffworks.com/1981-baseball-season.htm

Much to the dismay of baseball fans, the 1981 baseball season is best remembered for the ten-week players' strike that canceled 713 games and ushered in the unpopular split-season format. Learn more about the 1981 baseball season.

Hair Replacement Guide

health.howstuffworks.com/skin-care/hair-care/scalp-treatments/hair-replacement.htm

Hair replacement is one solution for millions of men and women around the globe are affected by thinning hair. Learn hair replacement options.

How Hydraulic Cranes Work

science.howstuffworks.com/transport/engines-equipment/hydraulic-crane.htm

Hydraulic cranes perform seemingly impossible tasks, lifting 70-ton objects with absolute ease. See the simple design behind the Herculean results.

How Stinger Missiles Work

science.howstuffworks.com/stinger.htm

The Stinger missile is a deadly man-portable air-defense system (MANPADS) that can be rapidly deployed by ground troops. It's lightweight, combat-proven and has a greater than 90 percent success rate. So how are Stingers used and against whom?

How Dimmer Switches Work

home.howstuffworks.com/dimmer-switch.htm

A regular light switch takes care of off and on. A dimmer switch handles off, on and everything in between. Find out what this clever switch does with electrical current.

How Car Computers Work

auto.howstuffworks.com/under-the-hood/trends-innovations/car-computer.htm

Cars seem to get more complicated with each passing year. Today's cars might have as many as 50 microprocessors on them. Essentially, you're driving around in a giant computer. Learn all about it.

Sperm Banks

health.howstuffworks.com/pregnancy-and-parenting/pregnancy/fertility/sperm-bank.htm

Sperm banks use sperm donors to gather or preserve sperm. Learn how a sperm bank stores sperm and screens donors.

2121 - 2130