Cómo se llama el componente, que permite abrir o cerrar un circuito eléctrico

What is the component called, which allows you to open or close an electrical circuit?

Steam is to be condensed in the condenser of a steam power plant at a temperature of 50°C with cooling water from a nearby lake, which enters the tubes of the condenser at 18°C at a rate of 97 kg/s and leaves at 27°C.

For a signal that is time limited to 10 ms and has an essential bandwidth of 10 KHz, determine, the number of signal samples necessary to compute a power-of-2 FFT with a frequency resolution of 50 Hz. Explain whether any zero padding is necessary.

very long pipe of 0.05 m (r1) radius and 0.03 m thickness (r2 - r1) is buried at a depth of 2m (z) to transport liquid nitrogen. The top surface of the ground is flat and has a uniform temperature.

A heat engine receives heat from a heat source at 1453 C and has a thermal efficiency of 43 percent. The heat engine does maximum work equal to 539 kJ.

Poses the greatest risk to workers because it is more common in more easily transmitted in other blood-borne diseases

16 Suppose that a steel of eutectoid composition is cooled to 550°C (1020°F) from 760°C (1400°F) in less than 0.5 s and held at this temperature.

The rotor in a shaded pole motor consists of A coils energized by alternating current B a short circuited loop of copper wire c a permanent magnet D an iron cylinder

What factors are likely to promote the formation of stress corrosion cracks?

Find the mass if the force is 18 N and the acceleration is 2 m/s2

Which process must first take place in order for the proteins in foods to be used by body cells? (1) digestion (3) synthesis (2) storage (4) excretion