ISSN:0002-9505    

DOI:10.1119/1.14671

出版商:American Association of Physics Teachers    

年代:1986

数据来源: AIP

ISSN:0002-9505    

DOI:10.1119/1.14672

出版商:American Association of Physics Teachers    

年代:1986

数据来源: AIP

ISSN:0002-9505    

DOI:10.1119/1.14863

出版商:American Association of Physics Teachers    

年代:1986

数据来源: AIP

ISSN:0002-9505    

DOI:10.1119/1.14678

出版商:American Association of Physics Teachers    

年代:1986

数据来源: AIP

ISSN:0002-9505    

DOI:10.1119/1.14679

出版商:American Association of Physics Teachers    

年代:1986

数据来源: AIP

摘要:

The naming of the deuteron involved a protracted debate between 1933 and 1935. The principal protagonists were Harold C. Urey, Gilbert N. Lewis, Ernest O. Lawrence, and Ernest Rutherford, but others on both sides of the Atlantic entered the fray as well. This paper examines the arguments and issues that emerged in the debate, and the process by which agreement was finally achieved on the name for this new particle.

ISSN:0002-9505    

DOI:10.1119/1.14680

出版商:American Association of Physics Teachers    

年代:1986

数据来源: AIP

摘要:

Several discussions of the testing of Bell’s theorem have emphasized one possible implication of the test results, namely, that nature at the atomic level is nonseparable. This paper seeks to clarify an alternative approach, which is inherent to the Copenhagen interpretation of quantum mechanics. In particular, it emphasizes the distinction between what we call ‘‘physical properties’’ and what could justifiably be termed ‘‘objective attributes of physical reality.’’

ISSN:0002-9505    

DOI:10.1119/1.14681

出版商:American Association of Physics Teachers    

年代:1986

数据来源: AIP

摘要:

At altitudes greater than a few kilometers the horizon is indistinct because of contrast reduction, even on extraordinarily clear days. An airplane passenger flying over an ocean cannot point to the apparent boundary between earth and sky and confidently proclaim its distance. To determine the distance to the horizon to within 10% requires knowing its angular position to within a few minutes of arc. This is unattainable in a realistic atmosphere, even one that is very clean. Scattering by the air molecules themselves is not quite sufficient to blur the horizon, but it does not take many particles before the horizon becomes indistinct.

ISSN:0002-9505    

DOI:10.1119/1.14659

出版商:American Association of Physics Teachers    

年代:1986

数据来源: AIP

摘要:

Traditionally, the spring‐hanging mass oscillator has been modeled as a textbook harmonic oscillator with an augmented hanging mass to account for the finite mass of the spring. This traditional model distorts the partition of energy between the spring and the hanging mass while the present analysis reveals the true partition of energy. Changes in effective spring mass and spring constant are tracked across the range of hanging mass in terms of kinetic and potential energy distributions on the coil spring. Results for the case farthest from the textbook, that of the spring along, reveal how, as hanging mass is removed, the spring effectively shortens, stiffens, and uses it own free‐end as a hanging mass.

ISSN:0002-9505    

DOI:10.1119/1.14660

出版商:American Association of Physics Teachers    

年代:1986

数据来源: AIP

摘要:

The energy that would be carried by a wave produced by the superposition of two small amplitude mechanical waves of the same type would generally differ from the sum of the energies of the component waves in the superposition. Thus energy conservation appears to be violated. In this paper we address the question of the compatibility of the principles of superposition and energy conservation for small amplitude mechanical waves. We show that in the course of producing a pair of waves that interfere constructively, a second pair of waves that interfere destructively is naturally and unavoidably produced. Moreover, we show that the combination of constructive and destructive intereference is just that necessary for energy conservation. Thus we conclude that the principles of superposition and energy conservation are fully compatible.

ISSN:0002-9505    

DOI:10.1119/1.14661

出版商:American Association of Physics Teachers    

年代:1986

数据来源: AIP