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What is the integral sign with a circle in it?

Joe Ford

What is the integral sign with a circle in it?

3 Answers. It’s an integral over a closed line (e.g. a circle), see line integral. In particular, it is used in complex analysis for contour integrals (i.e closed lines on a complex plane), see e.g. example pointed out by Lubos.

How do you type the integral symbol?

To type the Integral Symbol anywhere on your PC or Laptop keyboard, press Option + B shortcut for Mac. And if you are using Windows, simply press down the Alt key and type 244 using the numeric keypad on the right side of your keyboard.

Does the cyclic integral of heat have to be zero?

Does the cyclic integral of heat have to be zero (i.e., does a system have to reject as much heat as it receives to complete a cycle)? Explain. Ans: No. A system may reject more (or less) heat than it receives during a cycle.

Which one of the following is correct the cyclic integral of δq − δw for a process is?

Answer. Answer: positive,negative or zero .

What is the cyclic integral of dQ T for irreversible process?

Explanation: ⌠ dQ/T = (6000/523) – (6000/303) = –8.33 kW/K < 0.

Which of the following types of energy can be present in molecules?

Discover the different types of energy

  • Thermal (Heat) Energy. Thermal energy is created from the vibration of atoms and molecules within substances.
  • Chemical Energy.
  • Nuclear Energy.
  • Electrical Energy.
  • Radiant Energy.
  • Light Energy.
  • Motion Energy.
  • Sound Energy.

For which type of process the overall internal energy change of the system is zero?

Isothermal process

Why is enthalpy used instead of internal energy?

It simplifies thermodynamic analysis. Enthalpy (H) combines the internal energy and the product of pressure and volume of the system (boundary work). So essentially the enthalpy change defines the useful energy exchange of the system when it undergoes any energy interaction such as work and heat transfer.