Potential height

Figure J One-dimensional plot of the sum of the harmonic-oscillator and of the electron-repulsion potentials V for two electrons as a function of the internal coordinate za for coz = 5.0(a), 1.0 (b), and 0.1 (c). The solid red line represents the sum of the harmonic-oscillator and the electron repulsion potentials, while the dotted grey line represents the harmonic-oscillator potential alone. The maximum potential height Vmax and the domain of the za coordinate displayed are Vmax = coz x 10 and Iza I < respectively, for all cases. (For interpretation of the references to color in this figure legend,...

V0 is the potential height, and describes the rotation of the methyl groups. Steiskal and Gutowsky (20) give the dependence of the tunneling frequency vT of the reciprocal absolute temperature as parameter for V0. Figure 5 gives these results. 

Figure 5. Comparison of the correlation frequencies calculated according Equation 1 with the averaged tunneling frequencies vr calculated by Stejskal and Gutowsky for the methyl groups assumed as quantum-mechanical rotators as a function of the temperature for PC (x) and PMST (o). The potential height in units of kcal./mole is the parameter...

Kronig and Penney made the assumption that potential energy is zero near the nucleus and is maximum V0 at the point half way between two neighbouring nuclei. Further, they assumed the product of the potential height and the width (V0w) as constant. They obtained the relation... 

Potential (Height/Mass) E-3 Loss of confinement—Impacts (falling objects), dropping E-4 Direct Exposure—Worker injury E-5 Criticality—Loss of configuration or spacing... 

The potential contours thus obtained are shown in Figure 7 as a three dimentional scheme and in Figure 8 as a two dimentional one. The value of and 2 were put to be 0 when the chain becomes trans conformation, and the sign of 0 was positive for counter-clockwise rotation. The potential contours show two minima and a saddle point between them. The activation energy for the 2-state transition is assumed to be the mean value of the potential heights from the both minima to the saddle point. Thus, using the values of AU and Ay estimated from the potential contours and using the equation (3), the value of y was calculated. These calculated values and the values related to the potential minima are tabulated in Table IV. 

To obtain a maximum in the internal friction an upper limit of the potential height must be assumed. Instead of a cut-off in the distribution P(A, V) and following Ref [11], a Gaussian distribution with a width uo will be assumed ... 

From an assumed form of quasi-linear double minimum potential. Height of barrier is about 2250 cm above the zero point. 

Removal of asbestos cement sheets causes problems because of their potential height and fragility, and weathering which produces fibrous surface dust. Basic principles to follow are ... 

Estimate a value of the potential height between 2R and 2.25/ . Give the value both in J and as multiplier of ksT. Comment on the results. 

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