we make use of the observation that a charge (whether magnetic or electric, hence electromagnetic) in a field experiences force. For example, a wire carrying a current builds up a magnetic field around it, and when we place something with a magnetic charge near it (like a compass needle) it pushes the needle to try to line it up with the field (it's definitely not that simple, but it works unless you start doing the calculus and Fourier Transforms). Another neat trick; if we bring a second wire close to the first wire carrying the current, the field pushes on the electrons in the second wire and that tries to make a current in the second wire. This trick works on almost all electromagnetic fields, whether made by current flowing or by something else.
No. Any current produces a magnetic field. Look at Maxwell's equations.
It has everything from advanced root trinomial functions pertaining to real life physics. They have to be able to use these skills to calculate the movement of a comet. They will be given certain conditions about the comet.
The thermocouple generates a small amount of electricity when it is heated which sticks open an electromagnetic valve,If the thermocouple fails, you'll be able to light the pilot, but it will shut down when you release the button.They're easy enough to replace, and they're under $20.Remember, this is an electrical connection, not gas. You don't have to sock it down or use sealer.
By using this tag you are able to define after how long a page has to be refreshed or after a certain period of seconds you want your visitor to be redirected to another webpage. Search engines usually don't like it when you use refresh pages. A better solution is to add a click able link.An example of a refresh value is:This refresh-tag will redirect you to another webpage automaticly.
Relaxation oscillators just requie a certain voltage range in which to operate, so most any schematic for one will work, providing you have enough D cells to be able to supply the proper voltage.
No, electric fields cannot be directly seen by human eyes because they are invisible. However, their effects can be observed through phenomena like the movement of charged particles or the attraction/repulsion of objects in an electric field.
The question founders on the rocks of a chicken/egg conundrum. The presence of both an electric field and a magnetic field is required in order to produce an electromagnetic wave.
An electromagnetic wave does not need a medium. It is able to pass through a vacumn.
Electromagnetic waves have both electrical and magnetic properties. These waves result from the oscillation of electric and magnetic fields perpendicular to each other and are able to travel through a vacuum. Examples of electromagnetic waves include light, radio waves, microwaves, and X-rays.
The "medium" is whatever a wave requires, to be able to travel - so, the wave travels through a medium. In the case of electromagnetic waves, this medium is space itself, since it has certain electrical and magnetic properties.
Babies do not have the ability to perceive or sense when someone is pregnant. They are not able to understand or detect pregnancy in others.
No sure what you mean by "the reason." Electromagnetic waves exist in our Universe. Our eyes are able to detect a small fraction of the spectrum of these waves, and we call that small fraction of the spectrum, "light." In other words, the reason that light is an EM wave is because it IS.
Electromagnetic radiation is made up of electric and magnetic fields oscillating together in the form of waves. These waves can vary in frequency and wavelength, giving rise to different types of electromagnetic radiation such as radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays.
Approx. 80 Hz
300 Hz Mbambi
Unfortunately, sodium laureth sulfate inhibits the taste buds that perceive sweetness
They are able to detect electric fields created by the movement of their prey. They have sensors at each end of the 'hammer head' to find the location and direction of the prey.In a similar way we use two eyes spaced apart to perceive depth of vision.