科学和法律. 科学和法律. 解决专利问题的解决方法
John P Walsh1, Wesley M Cohen, Ashish Arora
1Department of Sociology, University of Illinois at Chicago, Chicago, IL 60607-7140, USA. jwalsh@uic.edu
Science (New York, N.Y.)
|February 15, 2003
概括
No abstract available in PubMed .
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01:49Probability Laws
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01:49Law of Segregation
When crossing pea plants, Mendel noticed that one of the parental traits would sometimes disappear in the first generation of offspring, called the F1 generation, and could reappear in the next generation (F2). He concluded that one of the traits must be dominant over the other, thereby causing masking of one trait in the F1 generation. When he crossed the F1 plants, he found that 75% of the offspring in the F2 generation had the dominant phenotype, while 25% had the recessive phenotype.
02:31Scientific Laws and Theories
Scientific Laws
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The magnitude and direction of a magnetic field created by a steady current can be calculated using the Biot-Savart law.
Consider a mobile phone battery bank as a source of steady current, which flows through the wire connected between the two. What is the magnitude of the magnetic field created by this current at a field point P?
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Consider a mobile phone battery bank as a source of steady current, which flows through the wire connected between the two. What is the magnitude of the magnetic field created by this current at a field point P?
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01:17Ampere-Maxwell's Law: Problem-Solving
A parallel-plate capacitor with capacitance C, whose plates have area A and separation distance d, is connected to a resistor R and a battery of voltage V. The current starts to flow at t = 0. What is the displacement current between the capacitor plates at time t? From the properties of the capacitor, what is the corresponding real current?
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For the first part of the problem,...
01:16Models, Theories, and Laws
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