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Do experimental measurements give the true value of physical quantity?
Wiki User
∙ 10y ago
No because there are always experimental errors, instrument limitations, and deviations in measurements. This is called the uncertainty. Experimental values do not give true values but rather a value with an uncertainty.
Wiki User
∙ 10y ago
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What is the numerical value when unit is equals to the physical quantity?
1 (one).
What is difference between the accepted value and the experimental value?
the answer is error or experimental error.
Name the physical quantity which has the same value for the waves belonging to different em spectrum?
there is no need of medium to travel
Is radius a scalar?
Yes. A scalar is a physical quantity that does not depend on direction. For example, temperature is a scalar because it has no directional value. Velocity is not a scalar (it is a vector quantity) because it has direction.
How do you find absolute discrepancy...this is different from percent discrepancy?
Absolute discrepancy is the difference between the accepted value, aka theoretical value, and the measured or "experimental" value. This discrepancy is written as an integer with units (i.e. cm) as opposed to a percentage.
What physical quantity?
a physical quantity is either within physics that can be measured (eg:mass,volume) or the result of a measurement.a physical quantity is usually expressed as the product of numerical value and a physical unit.by sukhpreet 9th a d.p.s faridkot
What are the two parts of a measurements?
-the quantity (magnitude,numerical value). -the units (in inch,meter,light year).
What is the numerical value when unit is equals to the physical quantity?
1 (one).
What are the two parts of measurements?
The quantity (magnitude, numrical value) and the units (eg inch, metre, light year)
Why expectation values are used?
In quantum mechanics,we are not certain about any physical quantity(unlike classical echanics).So,here value of every physical quantity can only be approximated or expected
What is the difference between true value and experimental value?
true value is something that is true and experimental value is some thing that has been experimental with
Why is the fundamental value of a quantity not changed when the quantity is multiplied by a conversion factor?
the conversion factor merely changes the number in such a way that it fits the new units the physical quantity is not changed
What is the difference with precision and accuracy?
Accuracy refers to how close a measured value is to an excepted value. Precision refers to how close a series of measurements are to one another For example, if your experimental value is 15.63 and your values are... 12.84 13.02 12.96 They would be precise because they are close to one another but not accurate because they're not even close to the experimental value
Why the value of experimental density be smaller or larger than the value of theory density?
Errors in measurement are the most likely cause, either due to limitations in the instruments used, or error in reading the measurements.
What does the term true value mean in science?
In classical physics it was thought that every physical quantity has a "true value" that can be only estimated through measurements due to measurements errors. The way of getting nearer and nearer to this "true value" was thought on one side to increase the measurement accuracy, on the other side to increase the number of measurements so to use statistical methods to attenuate the effect of random errors. The situation is completely changed with quantum mechanics. In quantum mechanics an "intrinsic" inaccuracy affects all the physical quantities, independently of measurement errors. Thus physical quantities would be random variables even if measured by an ideal instrument with no bias and no random error. Thus, in modern physics no physical quantity "true value" exists. The only exception is the very rare and particular case of quantum self-state of a certain variable, where that variable only ha a precise value (but not the other variables of the problem !). However this is an extreme and unpractical case, and it seems to me not the case of going in deep in its explanation here.
What is accuracy?
Precision -- the degree to which the result of a measurement, calculation, or specification conforms to the correct value or a standard
What is difference between the accepted value and the experimental value?
the answer is error or experimental error.
