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What are energy and work? What is kinetic energy? What is gravitational potential energy? What is conservation of energy? Work and the work-energy principle. Work as the transfer of energy. Work example problems. Work as area under curve. Thermal energy from friction.
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By definition, one watt is equal to one joule of work done per second. So if P represents power in watts, Δ E is the change in energy (number of joules) and Δ t is the time taken in seconds then: P = Δ E Δ t. There is also another unit of power which is still widely used: the horsepower.
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Master Algebra I with Khan Academy's interactive lessons and practice exercises, covering key concepts and problem-solving techniques.
What are PV diagrams? PV diagrams - part 1: Work and isobaric processes. PV diagrams - part 2: Isothermal, isometric, adiabatic processes. Thermodynamic processes.
So if we add our heat and our work here, we get that the overall change in internal energy for this process is negative 460 joules. So, the key things to remember here, for this kind of problem, is to double check your signs for work and heat, and also to make sure all of your units match.
Let's practice solving real world problems like this involving units! **Unit guides are here!** Power up your classroom with engaging strategies, tools, and activities from Khan Academy’s learning experts.
Algebra 2 | Math | Khan Academy. Unit 1 Polynomial arithmetic. Unit 2 Complex numbers. Unit 3 Polynomial factorization. Unit 4 Polynomial division. Unit 5 Polynomial graphs. Unit 6 Rational exponents and radicals. Unit 7 Exponential models. Unit 8 Logarithms.
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