This activity shows students the engineering importance of understanding the laws of …
This activity shows students the engineering importance of understanding the laws of mechanical energy. More specifically, it demonstrates how potential energy can be converted to kinetic energy and back again. Given a pendulum height, students calculate and predict how fast the pendulum will swing by using the equations for potential and kinetic energy. The equations will be justified as students experimentally measure the speed of the pendulum and compare theory with reality.
Students learn the history of the waterwheel and common uses for water …
Students learn the history of the waterwheel and common uses for water turbines today. They explore kinetic energy by creating their own experimental waterwheel from a two-liter plastic bottle. They investigate the transformations of energy involved in turning the blades of a hydro-turbine into work, and experiment with how weight affects the rotational rate of the waterwheel. Students also discuss and explore the characteristics of hydroelectric plants.
With an introduction to the ideas of energy, students discuss specific types …
With an introduction to the ideas of energy, students discuss specific types of energy and the practical sources of energy. Hands-on activities help them identify types of energy in their surroundings and enhance their understanding of energy.
Students learn how engineers transform wind energy into electrical energy by building …
Students learn how engineers transform wind energy into electrical energy by building their own miniature wind turbines and measuring the electrical current it produces. They explore how design and position affect the electrical energy production.
This resource is a video abstract of a research paper created by …
This resource is a video abstract of a research paper created by Research Square on behalf of its authors. It provides a synopsis that's easy to understand, and can be used to introduce the topics it covers to students, researchers, and the general public. The video's transcript is also provided in full, with a portion provided below for preview:
"For patients in need of breathing assistance, mechanical ventilation can save lives. But it can also worsen or even initiate lung injury, which could prove fatal. Although excess tidal volume is associated with ventilator-induced lung injury, no prior reports address the effects produced by the combination of tidal volume and mechanical power – the energy transferred from a ventilator to the lungs as a function of time. To answer this question, an international research team looked at varying combinations of tidal volume, respiratory rate, and mechanical power to determine how each contributes to injury. Their results suggest that mechanical power plays a larger role than previously thought. The team randomized 32 Wistar rats with experimental mild acute respiratory distress syndrome to receive either low- or high-power mechanical ventilation, in combination with low or high tidal volume. In the low-power groups, the respiratory rate was adjusted to maintain normocapnia..."
The rest of the transcript, along with a link to the research itself, is available on the resource itself.
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