The laboratory experiment described provides insight into the energetics of hydrogen evolution at an electrode as well as the intrinsic barrier that typically impedes reaction. In the course of the exercise, students find that Sn(s) is thermodynamically capable of combining with protons to form hydrogen, but that the direct reaction occurs at a…

The American Association for the Advancement of Science (AAAS) strongly recommends that "science be taught as science is practiced." This means that the teaching approach must be consistent with the nature of scientific inquiry. In this article, the authors describe how they added scientific inquiry to a large lecture-based physiology…

Marton and Säljö ("Br J Educ Psychol" 46:4-11, 1976a) described deep-level and surface-level processing in experiments in which students read and recalled academic texts. They did not discuss whether levels of processing had any counterparts in students' everyday studies. However, their article is often credited as the source of the…

Poggendorff showed experimentally, in the middle of the 19th century, that the weight of an Atwood machine is reduced when it is brought to motion. His experiment has been revisited from time to time, making use of instrumentation that reflects the technological development of the moment. In this paper, the evolution of the experiment is briefly…

As presented in physics textbooks, as well as in a few papers, the typical example of an induced motional electromotive force e[subscript mot] = "Blv" consists of a conductive rod of length "l" frictionlessly sliding with speed v along parallel wires within an orthogonal and constant uniform magnetic field of magnitude…

We have developed much simpler cloud chambers that use only ice and cooking salt instead of the dry ice or ice gel pack needed for the cloud chambers produced in our previous work. The observed alpha-ray particle tracks are as clear as those observed using our previous cloud chambers. The tracks can be observed continuously for about 20?min, and…

Trampolines can be found in many gardens and also in some playgrounds. They offer an easily accessible vertical motion that includes free fall. In this work, the motion on a trampoline is modelled by assuming a linear relation between force and deflection, giving harmonic oscillations for small amplitudes. An expression for the cycle-time is…

This paper introduces and illustrates Bi-relational Design (BD) as a general approach to (re)solving wicked problems. BD theorises oppositional, equipositional and para-positional approaches to problem-specific dyads (e.g., subjective/objective) based on a general consensus of research on epistemological development. These epistemic positions are…

Recently, several studies have argued that infants capitalize on the statistical properties of natural languages to acquire the linguistic structure of their native language, but the kinds of constraints which apply to statistical computations remain largely unknown. Here we explored French-learning infants' perceptual preference for…

Two experiments evaluated the effects of the simple-to-complex and simultaneous training protocols on the formation of academically relevant equivalence classes. The simple-to-complex protocol intersperses derived relations probes with training baseline relations. The simultaneous protocol conducts all training trials and test trials in separate…

Observation of the water jets flowing from three equidistant holes on the side of a vertical cylindrical bottle is an interesting and widely used didactical experiment illustrating the laws of fluids in motion. In this paper we analyze theoretically and numerically the ranges of the stationary water jets flowing from various rotationally symmetric…

The objective of this paper is to present a laboratory experiment that explains the phenomenon of sinking in quicksand simulated as a fluidized bed. The paper demonstrates experimentally and theoretically that the proportion of a body that sinks in quicksand depends on the volume fraction of solids and the density of the body relative to the…

Previous studies have shown that zinc deficiency leads to apoptosis of neuronal precursor cells in vivo and in vitro. In addition to the role of p53 as a nuclear transcription factor in zinc deficient cultured human neuronal precursors (NT-2), we have now identified the translocation of phosphorylated p53 to the mitochondria and p53-dependent…

Recently, medical students' scientific thinking skills have been identified as an important issue in medical education. Scientific thinking cannot be imparted in conventional lectures, but rather requires actively involving students. We modified a practical course in physiology. A study was designed to test whether the new course fosters…

What can we learn from K-5 science teachers who have integrated science and creative dance for a five-year period? In this paper, the preliminary findings of the qualitative research conducted by a constructivist elementary charter school principal, a university dance professor, and an educational researcher is presented.This research highlights…