How can I tell the speed of a moving vehicle?
I think I saw a UFO and I'm very curious to see if I can calculate the speed of the object moved. My main factor behind this is that the noise of the engine was heard at least 1.5 seconds after the craft passed. Does that mean he was traveling faster than the speed of sound? I have very little knowledge of physics and such, so any help is appreciated. Thank you.
Unfortunately, based solely on the delay of sound, it is impossible to judge how fast the vehicle was in motion. you need to know how high the engine flew, and the exact time period between when it passed directly overhead, and the highest point of the sound. even with all this, you not win a general approximation of its velocity. the fact that there was a delay of sound at all does not mean he was going faster than sound, it could be simply because he was so far away. like when a friend moves once through a football field and the sound is just a little late, it's only because its Travel is not as fast as one might think. the speed of sound is 770 miles per hour, but if a plan is 3,000 feet in the air, you could get significant delays.
![]() |
![]() Wood Penguin Family Scroll Saw Crafts US $4.99
|
![]() Wood Elephant Family Scroll Saw Crafts US $4.99
|
![]() Wood Horse Family Scroll Saw Crafts US $4.99
|
![]() New 30 piece Hobby Knife Miter Saw Cutting Craft Set US $19.99
|
![]() 3 5 8 Cherry Boards Craft Wood Thins Scroll Saw Boxes US $29.99
|
![]() Scroll Saw Woodworking Crafts Summer 2008 Scrollsaw US $6.99
|
![]() SCROLL SAW CRAFT BOOKS US $10.00
|
![]() Clear Dry Basswood Craft Board Scroll Saw Stock 1 2x6 US $6.99
|
![]() SCROLL SAW WOODWORKING CRAFTS Hol 2009 37 SANTA NEW US $10.00
|
![]() Woodworks Crafts Ornaments Scroll Saw Patterns 2004 US $4.50
|
![]() Paint Grade Basswood Craft Board Scroll Saw Stock 1 2x6 US $4.99
|
![]() 6 KD Figured Cherry Boards Craft Wood Scroll Saw Planks US $37.77
|
![]() 8 Clear Cherry Lumber Pieces Craft Intarsia Sroll saw US $11.95
|
![]() 8 Red Oak Lumber Pieces Craft Intarsia Sroll saw US $11.95
|
![]() 10 Red Oak Lumber Pieces Craft Intarsia Sroll saw US $11.95
|
![]() 10 Clear Cherry Lumber Pieces Craft Intarsia Sroll saw US $11.95
|
![]() Lot 14 Tulip Poplar Thins Scroll Saw Craft Wood Boards US $27.77
|
![]() Basswood Scroll Saw Doll Model Craft Wood 1 2 Board US $17.77
|
![]() |
4" Mini Table Saw Hobby Crafts 4500RPM w/ 2 Blades Sale Price: $47.99 Average Rating: ![]() |
![]() |
Hobby Knife & Miter Saw Craft Set List Price: $19.99 Sale Price: $15.63 Average Rating: ![]() |
|
This may be the last hobby cutting set you need to buy - this set is packed full of goodies from a razor sharp steel saw and miter box to surgical-steel blades with different sized handles, this set has you covered... |
![]() |
Leecraft DL-1U Zero Clearance Table Saw Insert for Delta Table Saw List Price: $24.10 Sale Price: $17.75 Used From: $15.99 Average Rating: ![]() |
|
The Leecraft Zero-Clearance Table Saw Insert supports work right up to the blade. With outstanding durability and wear-resistance, it also reduces chip-out and splintering. The zero-clearance concept is simple: the blade cuts its own perfectly sized slot by being raised through a machinable "blank" insert... |
![]() |
Leecraft CR-2 Sears Older 10-Inch Belt-drive Zero Clearance Table Saw Insert List Price: $27.10 Sale Price: $25.99 Average Rating: ![]() |
|
Leecraft zero clearance table saw inserts are precision machined from melamine faced high density phenolic laminate for outstanding durability and wear resistance. They maintain exceptional flatness, unlike wood or plastic inserts, and cut easily with carbide blades... |
![]() |
Leecraft JT-164 Jet/Powermatic 64A Zero-Clearance Table Saw Insert List Price: $24.10 Sale Price: $20.02 Average Rating: ![]() |
|
The Leecraft JT-164 Jet/Powermatic Zero-Clearance Table Saw Insert fits a variety of saws, including Jet: JTS-10, JCS-10, JTAS-10, JWCS-10; Powermatic 64 and 64A (left-tilt); most 10-inch Sunhill saws; Bridgewood TSC-10C and TSC-10CL; King KC10GC; General Intl... |
![]() |
Milwaukee 49-22-8105 Panel Saw Dust Collection Kit List Price: $544.50 Sale Price: $309.99 Average Rating: ![]() |
|
Self-contained Dust Collection Kit collects dust and debris when using Milwaukee's 6480-20 (H7000) Panel Saw *Kit consists of blade guard, dust tube, vinyl hose and roller assembly *Vacuum not included |
![]() |
Leecraft CR-1 Zero Clearance Table Saw Insert (For Craftsman/Sears) List Price: $24.10 Sale Price: $20.02 Average Rating: ![]() |
|
LEECRAFT Phenolic Inserts and Sheet Stock reduce splintering and chip-out on the bottom side of regular or dado table saw cuts. Simply raise your saw blade through the insert to create a "kerf" which precisely matches the blade on your saw... |
![]() |
Leecraft PM-1 Zero Clearance Table Saw Insert (For Powermatic Model 66) List Price: $23.50 Sale Price: $23.50 Average Rating: ![]() |
|
LEECRAFT Phenolic Inserts and Sheet Stock reduce splintering and chip-out on the bottom side of regular or dado table saw cuts. Simply raise your saw blade through the insert to create a "kerf" which precisely matches the blade on your saw... |
![]() |
Leecraft RG-1 Zero Clearance Table Saw Insert for Ridgid TS3650 Table Saw List Price: $27.10 Sale Price: $19.73 Used From: $22.99 Average Rating: ![]() |
|
The Leecraft Zero-Clearance Table Saw Insert supports work right up to the blade for smooth, more precise cuts. With outstanding durability and wear-resistance, it reduces chip-out and splintering, as well as saw noise... |
![]() |
Taunton's Complete Illustrated Guide to Tablesaws (Complete Illustrated Guides) List Price: $24.95 Sale Price: $15.65 Used From: $12.56 Average Rating: ![]() |
|
A complete visual guide to using the tablesaw from the most basic techniques to the most advanced. One of the most important tools in any woodworking shop, tablesaws are available in a tremendous variety of styles and prices... |


US $4.99
































