Seismic Waves. When you toss a pebble into a pond, it creates radiating waves in the water. An earthquake does the same thing with energy. When the plates fracture or slip, energy is released as seismic waves [source: USGS ]. There are several types of seismic waves. Body waves move through the inside of the Earth. There are two types of body waves: Primary waves (or P waves) are the fastest moving waves, traveling at 1 to 5 miles per second (1.6 to 8 kilometers per second). They can pass through solids, liquids and gases easily.
A #10 screw is bigger than a #8 screw and both of them are smaller than a quarter inch.0 is bigger.... the second number is threads per inch... so 10/32 or 10/24, 24 is a coarse thread and the 32 is a fine thread.... the last number is the length of the screw... 10/32 - 1 1/2 is a #10 screw with 32 threads per inch and is an inch and a half long. Mr. E Â· 5 years ago. Thumbs up. 5.
When you find the number of threads per inch, a fractional screw size would be written: diameter-threads per inch. Example: 1/2-20, 1/2 (inch) being the diameter and 20 threads per inch. click on pictures to enlarge. Most hobbyists don t have a thread pitch gauge, so you can use a scale.You can count how many thread crests are in an inch. If the fastener is short, measure how many in a quarter inch, then multiply by 4.he following is what I explain to my students how screw threads are described. Screw threads have two descriptions. One is its diameter, measured to the height of the threads. The other is how many threads per inch. Or, in metric use, the pitch of the threads that is the measurement from one crest to the next.