11-01-2020, 07:06 AM

About the physical constants included in HP Prime and CODATA (Committee on Data for Science and Technology)

By definition of SI, the 2017 CODATA special fundamental constant adjustment came into effect on May 20, 2019.

Now, Planck's constant h, elementary charge (elementary charge) e, Boltzmann's constant k, and Avogadro's number NA are the defined values.

Planck's constant h = 6.62607015 × 10^-34 J s (exact)

Boltzmann constant k = 1.380649 × 10^-23 J K-1 (exact)

Elementary charge e = 1.602176634 × 10^-19 C (exact)

Avogadro constant NA = 6.02214076 × 10^23 mol-1

As a result, the gas constant R = NA k also becomes an exact value.

molar gas constant R = 8.31446261815324 J K-1 mol-1 (exact)

And the kilogram prototype has finished its role and has become a kind of world heritage.

However, the fundamental physical constants of HP Prime (Software Version: 2.1.14433 (2020 01 21) seem to remain the values of CODATA2014 as follows:

Units> Constans> Quantum> h: 6.62607004E-34

Units> Constants> Chemistry> k: 1.38064852E-23

Units> Constans> Quantum> q: 1.6021766208E-19

Units> Constants> Chemistry> NA: 6.022140857E23

Units> Constants> Chemistry> R: 8.3144598

Units> Constants> Physics> ε0: 8.854187817E-12

Units> Constants> Physics> μ0: 1.2566370614E-6

The question is

(1) Will HP plan to update the physical constants of HP Prime in the near future?

(2) If not, is there a way for the user to change the built-in physical constants?

(These things are a bit annoying as they are slightly inconsistent with the current text we are using to teach in my class. In terms of defined values or measured values.)

For more information about fundamental physical constants :

Fundamental physical constants from NIST

By definition of SI, the 2017 CODATA special fundamental constant adjustment came into effect on May 20, 2019.

Now, Planck's constant h, elementary charge (elementary charge) e, Boltzmann's constant k, and Avogadro's number NA are the defined values.

Planck's constant h = 6.62607015 × 10^-34 J s (exact)

Boltzmann constant k = 1.380649 × 10^-23 J K-1 (exact)

Elementary charge e = 1.602176634 × 10^-19 C (exact)

Avogadro constant NA = 6.02214076 × 10^23 mol-1

As a result, the gas constant R = NA k also becomes an exact value.

molar gas constant R = 8.31446261815324 J K-1 mol-1 (exact)

And the kilogram prototype has finished its role and has become a kind of world heritage.

However, the fundamental physical constants of HP Prime (Software Version: 2.1.14433 (2020 01 21) seem to remain the values of CODATA2014 as follows:

Units> Constans> Quantum> h: 6.62607004E-34

Units> Constants> Chemistry> k: 1.38064852E-23

Units> Constans> Quantum> q: 1.6021766208E-19

Units> Constants> Chemistry> NA: 6.022140857E23

Units> Constants> Chemistry> R: 8.3144598

Units> Constants> Physics> ε0: 8.854187817E-12

Units> Constants> Physics> μ0: 1.2566370614E-6

The question is

(1) Will HP plan to update the physical constants of HP Prime in the near future?

(2) If not, is there a way for the user to change the built-in physical constants?

(These things are a bit annoying as they are slightly inconsistent with the current text we are using to teach in my class. In terms of defined values or measured values.)

For more information about fundamental physical constants :

Fundamental physical constants from NIST