0
Originally (around 1871) the length was established by a bar of a certain length, which represented one ten-millionth of the distance from the North Pole to the Equator.
In 1960, it was defined physically by an unchanging wavelength of light: "1,650,763.73 wavelengths of the orange-red emission line in the electromagnetic spectrum of the krypton-86 atom in a vacuum." This is still a very accurate definition.
Since 1983, it has been defined as "the length of the path travelled by light in vacuum during a time interval of 1/299,792,458 of a second." The second is currently defined relative to the radiation emission wavelength of cesium-133, which is a fixed length.
What else can I help you with?
How do scientists determine how old objects are by?
Archeologists determine how old an object is, by using Carbon Dating.
If you know the length of an object in centimeters how can you figure out the length of the object in millimeters without remeusuring?
Multiply by 100.
What can you determine from an irregular shaped object by its displacement?
The volume of the object.
What skills do scientists use when they investigate?
They do all sorts of things such as tasting the object, analyzing the object, and even seeing what animals will do to the object.
What two factors determine the type of image formed by lens?
The focal length of the lens and the distance between the lens and the object.
How do scientists use isotopes to determine the of an object?
Scientists use the relative amount of stable and unstable isotopes in an object to determine its age.
How do scientists determine how old objects are by?
Archeologists determine how old an object is, by using Carbon Dating.
In addition to the size an object in space appears which can be deceiving what other characteristic do scientists use to determine astronomic distances?
Scientists use the brightness of the object to determine its distance in space. By measuring how bright an object appears from Earth and comparing it to its actual brightness, they can calculate its distance based on the inverse square law of light.
How do you measure the volume of a regular object?
Volume = length x width x height... or aria times height
What is the most efficient way to determine the length of chain needed for wrapping a specific object using a chain wrap calculator?
To determine the length of chain needed for wrapping a specific object using a chain wrap calculator, input the dimensions of the object and the desired number of wraps into the calculator. The calculator will then calculate the total length of chain required for the wrapping process.
With radiocarbon dating scientists compare an object and acirc and 128 and 153s carbon-14 levels with .?
Scientists compare an object's carbon-14 levels with the known decay rate of carbon-14 to estimate the object's age using radiocarbon dating. By measuring the ratio of carbon-14 to carbon-12 in the object, scientists can determine how long it has been since the organism died.
Can scientists use the measure of density to tell if something will float. False True?
True. Scientists can use the measure of density to determine if an object will float or sink in a fluid. If the density of an object is less than that of the fluid, it will float; if the density is greater, it will sink.
The scale on a drawing is 3 in 4 ft. The actual length of the object is 24 ft. How many inches is the length of the object drawing?
To determine the length of the object in the drawing, use the scale of 3 inches for every 4 feet. First, find the ratio of the actual length to the scale length: ( 24 \text{ ft} \div 4 \text{ ft} = 6 ). Then, multiply this ratio by the scale length: ( 6 \times 3 \text{ in} = 18 \text{ in} ). Therefore, the length of the object in the drawing is 18 inches.
Can an object have the length of 10 meters and weigh 9 kg?
Theoretically, an object can have a length of 10 meters and weigh 9 kg, as length and weight are independent physical properties. However, it would depend on the specific material and shape of the object to determine if this is feasible in practice.
How does the concept of simultaneity enter into the measurement of the length of an object?
In the measurement of an object's length, simultaneity is important because different points on the object may be measured at the same time to determine its overall length. For accurate measurements, it is crucial to ensure that all measurements are taken simultaneously to avoid errors due to changes in the object's position or shape over time. Therefore, accounting for simultaneity helps maintain precision in determining the length of an object.
What science tool would you use to measure the length of an object?
You could use a ruler or a measuring tape to measure the length of an object. Both tools have markings that allow you to accurately determine the distance from one point to another.
How might the scientists use the cell theory to determine if the object is an organism?
Scientists could use the cell theory to determine if an object is an organism by examining its structure under a microscope for evidence of cells. If the object is composed of cells with a defined nucleus and membrane-bound organelles, it would align with the principles of the cell theory and likely be considered an organism. Additionally, observing characteristics such as growth, reproduction, and response to stimuli would further support this classification.
