Joules Per Second
Joules Per Second - Related Videos
01:23
The Joule and Joule–Thomson Experiments
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2026
Consider an adiabatic system composed of two chambers, A and B, designed such that no heat flows into or out of the system. Initially, chamber A is filled with a gas at a fixed temperature T1, pressure p1, and volume V1, while chamber B is evacuated. The gas is then gradually forced through a rigid, porous barrier to chamber B, ultimately reaching temperature T2, pressure p2, and volume V2. A piston on the right side maintains a constant pressure (p2), which is lower than p1. The significant...
01:21
Joule-Thomson Effect
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2025
The Joule-Thomson effect, also known as the Joule-Kelvin effect, describes the temperature change of a fluid when it is forced through a valve or porous plug while keeping it in a thermally insulated environment. This experiment is called a throttling process. This is an important effect widely used in refrigeration and the liquefaction of gases. This experiment forces high-pressure gas through a throttle valve or a porous plug to a lower-pressure region. The gas expands as it passes through to...
09:42
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Channels for the transportation of water molecules in enzymes influence active site solvation and catalysis. Herein we present a protocol for the engineering of these additional catalytic motifs based on in silico computer modeling and experiments. This will enhance our understanding of the influence of solvent dynamics on enzyme catalysis.
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Transplantation into the Anterior Chamber of the Eye for Longitudinal, Non-invasive In vivo Imaging with Single-cell Resolution in Real-time
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A new approach combining intraocular transplantation and confocal microscopy enables longitudinal, non-invasive real-time imaging with single-cell resolution within grafted tissues in vivo. We demonstrate how to transplant pancreatic islets into the anterior chamber of the mouse eye.
08:59
Looking for Driver Pathways of Acquired Resistance to Targeted Therapy: Drug Resistant Subclone Generation and Sensitivity Restoring by Gene Knock-down
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This is a time- and cost-effective in vitro protocol investigating the mechanisms of acquired resistance to targeted therapeutic agents, which is a highly unmet medical need in cancer management.
FAQs
The rate rises when a fixed amount of energy is transferred in less time, and it falls when the same energy transfer takes longer. Using P = E/t, a calculation therefore requires both the energy value in joules and the elapsed time in seconds. This makes the result directly comparable across different physical systems.
Equal energy transfers do not imply equal power because duration changes the rate. If one engine completes the transfer sooner, its joules-per-second value is higher, even when the total energy is identical. This comparison separates how much energy a system handles from how rapidly it handles it, which is useful when evaluating performance.
Joules per second provides a common basis for comparing energy transfer rates. A larger value indicates that more energy is transferred, converted, or used during each second, while a smaller value indicates a slower rate. Because one joule per second equals one watt, power figures can be reported and compared using either expression.
To calculate the value, identify the total energy transferred or used, record the time interval, express energy in joules and time in seconds, then divide energy by time. Measurements from an engine, electrical device, mechanical task, or heat-transfer process can be inserted into P = E/t to obtain the corresponding rate.
Applications span engines, electrical devices, mechanical work, and heat transfer. In each case, the value describes the rate relevant to that system: engine output, device energy consumption, mechanical task performance, or heat movement. Using the same power unit lets physics and engineering analyses compare these otherwise different processes on a consistent basis.
Comparing power values helps identify which system performs a task or uses energy more rapidly, but the comparison concerns rate rather than total energy alone. This distinction supports analysis of performance and efficiency in physics and engineering. A system with a higher value transfers or uses energy faster over the measured interval, making the result useful for evaluating operation.