0
It depends what you are measuring the speed of.
The best-known way to measure speed is to divide the distance travelled by the time taken. If a 20km trip takes 1 hour and 15 minutes (1.25 hours), then the speed is 20/1.25 = 16 km/h.
In any vehicle with wheels (car, bicycle, train), the distance can be found by counting the turns of the wheel. The speedometer is calibrated to show the speed.
A GPS calculates the distance travelled by measuring the distances between a series of points on the ground (The location of these points is established from satellite signals). Speed is then calculated from the time taken between each pair of points.
In an aircraft, speed is measured by a small tube pointed forward, called a pitot tube. The higher the air pressure in this tube, the greater the speed shown by the airspeed indicator. The vertical speed indicatormeasures the difference in the outside air pressure, which decreases with altitude.
In a boat the pitometer log operates on the same principle as an airspeed indicator, but with water instead of air.
All of these methods measure the speed with which you are moving. What if you want to measure the speed of something else?
A radar gun is used by police to catch speeders. It can also be used to tell the speed of a Baseball pitch or a tennis serve. It works on the Doppler effect: the frequency of the reflected radio waves goes up with increasing speed. The distance to a galaxy is related to its red shift(also a result of the Doppler effect) which shows the speed with which the galaxy is moving away from us.
The speed of a moving fluid can be measured by a propeller. An anemometer measures wind speed, and a velocimeter measures the speed of a stream.
Then again, you might want to measure the download speed of your internet connection, or the velocity of circulation of money, or . . .
Wiki User
∙ 10y ago
Add your answer:
Earn +20 pts
What does acceleration measure?
Acceleration measures the change in speed
What instrument measures the purity of Argon gas?
An argon gas analyzer measures the purity of Argon gas. The analyzer can be used to determine the actual content of Argon gas in a specific sample.
What measuring tools do mechanics use?
Tape measures Calipers Tachometer (measures the rotation speed of a shaft or disk, as in a motor or other machine
What is a difference between encoder and tachometer?
An encoder is a device, circuit, transducer, software program or person that converts information from one format or code to another. A tachometer is an instrument that measures the rotation speed of a shaft or disk, as in a motor or other machine. Most commonly this is the little rev counter on your car/truck that shows you the rate of rotation of the engine's crankshaft. Or in layman's terms, the RPM gauge. Hope this helps
What does a speed wrench do?
A speed wrench ratchets back and forth.
What is an anamometer?
It is an instrument that measurwa 'Wind Speed'.
What instrument measures velocity?
In a car, a speedometer. At a weather station, an anemometer measures wind speed.
What is the name of the equipment that measures speed?
This instrument is generally known as a Speedometer.
Is radiation the instrument used to measure wind speed?
No, a barometer measures air pressure. Though wind is caused by variances in air pressure the direct measurement of wind is done by an anemometeryes
Who measures anemometer?
An anemometer is used to measure wind speed.
What is the name of the wind instrument that measures wind?
An anemometer measures wind speed A wind vane shows the wind direction
Which is an instrument commonly used to measure wind speed?
An anemometer measures wind velocity.
What instrument measures prevailing wind?
An anemometer measures wind speed. On the other hand, a wind vein is used to determine the direction of the wind.
What information does a tachometer give you?
A tachometer is an instrument that measures the rotation speed of a shaft or disk, as in a motor or other machine.
What is tach?
A tach (short for tachometer) is an instrument that measures the rotation speed of a shaft or disk, as in a motor or other machine.
What instrument measures the wind of hurricanes?
Meteorologist observe the hurricane in a close distance with it. Maybe in the future there will be a tool which can measure the speed of the hurricane. :)
What weather instrument measures wind?
The wind direction is measured with wind vanes or wind socks. The wind speed is measured with an anemometer.
