Exciting examples of physics principles illuminate the power and scope of our discipline. In this paper, we discuss a conservation of energy example for an introductory course. Energy conservation is applied to bird and dinosaur eggs to derive a method to predict the incubation period and the embryonic metabolism solely from the egg geometry. The power of this fundamental principle to yield insights into a biological example helps to demonstrate the utility of conservation of energy.
References
1.
M. E.
Moses
, C.
Hou
, W. H.
Woodruff
, G. B.
West
, J. C.
Nekola
, W. Y.
Zuo
, and J. H.
Brown
, “Revisting a model of ontogenetic growth: Estimating model parameters from theory and data
,” Am. Nat.
171
, 632
–645
(2008
);
[PubMed]
C. R.
White
and M. R.
Kearney
, “Metabolic scaling in animals: Methods, empirical results, and theoretical explanations
,” Compr. Physiol.
4
, 231
–256
(2014
);
[PubMed]
S. A.
Lee
, “Incubation times of dinosaur eggs via embryonic metabolism
,” Phys. Rev. E
94
, 022402
(2016
).
[PubMed]
2.
Readers can view the appendix
at TPT Online, https://doi.org/10.1119/5.0018956, under the Supplemental tab.3.
J. M.
Grady
, B. J.
Enquist
, E.
Dettweiler-Robinson
, N. A.
Wright
, and F. A.
Smith
, “Dinosaur physiology: Evidence for mesothermy in dinosaurs
,” Science
344
, 1268
–1272
(2014
).4.
S. A.
Lee
, “Trends in embryonic and ontogenetic growth metabolisms in nonavian dinosaurs and extant birds, mammals and crocodylians with implications for dinosaur egg incubation
,” Phys. Rev. E
99
, 052405
(2019
).5.
The replica of the hummingbird egg can be purchased
at https://www.acornnaturalists.com/hummingbird-egg-replica.html. Replicas of hummingbird and ostrich eggs can be purchased from OakGroveCuriosities at etsy.com
. Replicas of chicken eggs are available in commercial stores (particularly close to Easter) and online stores.
6.
J. D.
Thomas
, S. A.
Lee
, M.
Cooley
, and R. E.
Irving
, “The mass of hatchling tyrannosaur and sauropod dinosaurs
,” Phys. Teach.
58
, 289
–293
(Sept. 2020
).7.
M. E.
Hauber
, in John
Bates
and Barbara
Becker
(Eds.), The Book of Eggs: A Life-Size Guide to the Eggs of Six Hundred of the World’s Bird Species
(The University of Chicago Press
, Chicago, IL
, 2014
), p. 655
.8.
J.
Canny
, “A computational approach to edge detection
,” IEEE Trans. Pattern Anal. Mach. Intell.
8
(6
), 679
–698
(1986
).9.
L. M.
Chiappe
, “Downsized dinosaurs: The evolutionary transition to modern birds
,” Evol. Educ. Outreach
2
, 248
–256
(2009
).10.
S. A.
Lee
, “Incubation times of dinosaur eggs via embryonic metabolism
,” Phys. Rev. E
94
, 022402
(2016
).© 2021 Author(s). Published under an exclusive license by American Association of Physics Teachers.
2021
Author(s)
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