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Consumer Electronics
Ask questions here about the electronics you use every day: from phones and computers to kitchen appliances and radios.
4,952 Questions
Size of conductor used for 132kv line?
The so-called SIL (surge impedance loading) of a transmission line is given by P = U2 : Z, where P is the power tansmitted, in MW, U is the line voltage in kV, and and Z is the surge impedance of the line, in ohm. For a 132 kV overhead transmission line, it is typically 400 ohm. The SIL is the power trasnmitted that causes the minimum of losses, that is, it is the most economical condition to operate the line. For example. P = 1322 / 400 = 43.56 MW =43,560 kW The current per phase is I = P / 1.732 U = 43,560 / (1.732 x 132) = 190.5 A If the cable is ACSR (aluminum cable, steel reinforced), it can carry about 1 A/mm2 So a conductor of about 200 mm2 cross section would be a good choice. This calculation just gives a rough idea of the size of the conductor, since the best result is given after several other factors are taken into account, e.g., length of the line, cost of energy loss, cost of cable, cost of steel structures, standardized cable sizes available, etc.
How can you find instructions for 3M Atomic Clock Catalog AC100MB?
Not sure what you're needing to do. But to set up the clock and the outdoor temperature sensor, make sure the batteries are new for both. Put the batteries in the outdoor sensor first. Wait to see the temperature reading on the sensor. Then put the batteries in the clock. In about 15 minutes the outdoor temperature should show on the clock.
Do not set the clock until the outdoor temperature is displayed. You can set the clock manually, or set the button on the back to atomic so that it will automatically receive the time.
How much time is required for light to travel across the diameter of the orbit?
It takes light approximately 8.3 minutes to travel across the diameter of Earth's orbit around the sun, which is about 186 million miles. This value is known as the astronomical unit (AU) and is used as a standard unit of measurement in astronomy.
Name two organs that are primarily food conduits?
Esophagus and intestines are primarily food conduits in the body. The esophagus helps transport chewed food from the mouth to the stomach, while the intestines absorb nutrients from the digested food and eliminate waste.
No, quartz is not heavy for its size. It is considered a lightweight mineral with a density of around 2.65 grams per cubic centimeter, making it lighter compared to other minerals of similar size.
How do you find the charge on one electron?
the charge on one electron is 1.6*10 to the power -19
1C=6*10to power18
1e=1/6*10 to power 18
=[1/6]*10 to power -18
=0.166666.....*10 to power -18
=1.6[rounded off]*10 to power -19
hence the answer
What is the total magnification if the microscope is on low power 20x?
200X
20X * 10X
The 10X is the ocular lens of compound microscopes. Where your eyes go.
Is there anyway to get 220V 60hz from a 110V 50hz power supply?
It would involve some electronics work but it could be done. Might add that it could be more expensive than just buying the proper power supply. Use
Use 220V 60hz motor to run 110V 50hz Generator.
Why do the clocks go back when they are trying to save energy?
Daylight Saving Time moves clock forward in the spring to make better use of daylight. This is meant to save energy by reducing the need for artificial lighting in the evening. Conversely, clocks go back in the fall to shift more daylight into the morning hours, again reducing the need for electric lighting and saving energy.
manifestations for superficial frostbite present as a white, waxy, soft, and numb appearance of the injured area while it is still cold. As thawing occurs, the area becomes flushed, edematous, and painful, and may become mottled and purple. Within 24 hours, large blisters form and remain for about 2 weeks before turning into a hardened eschar, which separates in about a month. As the eschar separates, it leaves painful, sensitive new skin that often sweats excessively. In deep frostbite, the injured part remains hard, cold, mottled, and blue-gray after thawing; edema forms in entire limb and may remain for months. Blisters may or may not form weeks after the injury. After several weeks, dead tissue blackens and sloughs off and a line demarcates dead from live tissue.
What is an example of something a yard long?
An adult human arm or leg is typically about a yard long.
What are the advantages and disadvantages of electric appliances?
Electrical power advantages include:
1. clean.
2. cheap
3. easily be switched on and off
4. Easy to transport via power lines
5. Easy to convert
6. Can be produced using many methods
Disadvantages:
1. often made through dirty methods
2. Can be unsafe if not handled correctly
3. Humans can become dependent on the regular flow of energy
When pulling a vacuum on a refrigeration unit how many microns should you pull it down to?
Typically, it is recommended to pull a vacuum on a refrigeration unit down to 500 microns or lower to ensure that moisture and non-condensable gases are removed, preventing any potential issues with the system in the future.
What wire gauge is used for a toaster?
A toaster typically uses wire gauge sizes between 14-16 AWG for the power cord, depending on the wattage and length of the cord. It is important to use the appropriate wire gauge to handle the current safely and prevent overheating.
If you mean an electric field it is the field that surrounds an electric charge. If you have two parallel plates with positive and negative charges, the amount of electric field in the space between the plates is the voltage difference divided by the distance.
Electric field E is measured in volts per metre.
Do batteries work well in a wet environment?
No. They need to be protected from the elements, like rain, dust and standing water. With voltage applied, water forming on the leads causes corrosion and reduces very quickly the battery's ability to product the level of current they were originally rated for when new. Eventually enough corrosion will form at both ends and then the electrical connection will be lost, and/or the battery case will leak and cause great damage to the insides of whatever they are installed in.
Air viscosity is a measure of the resistance of air to flow or movement. It is influenced by factors such as temperature and pressure, with higher temperatures and lower pressures generally leading to lower viscosity. Viscosity is an important factor in aerodynamics and fluid dynamics, affecting how air flows around objects and surfaces.
The height of the ramp should be the only variable in Rebecca's experiment. All other factors should be kept constant to isolate the effect of ramp height on the speed of the marble.
Hertz cycle meter on a generator that is not showing a reading how can it be checked?
Disconnect and take the meter out. If it is a 120V meter, just connect it to a lamp cord and plug it in. If it still doesn't register, you have a dead meter. Sometimes they get stuck...you can tap on the face gently if nothing else works. Oh, and BE CAREFUL with that high voltage!!!
How does traveling at light speed negate time?
Answer:
In fact light speed is not the question you should be asking. It should be "when traveling at the universal speed limit, why does time slow down." The answer is that no matter how fast you are traveling the universal speed limit (equal to light speed because it goes max speed) is viewed the same. The theory is that all clocks/measuring devices are morphed in the same way so that when it measures the speed limit it is still the speed of light (universal speed limit)
AKA, all clocks, even biological, are slowed down as it travels faster through space time. So your perception is slowed and your recognition of this perception is slowed, so for you time appears the same. If you travel 95% the speed of light and flick on a light, it wont travel 5% the speed of light away from you, it will travel 100% the speed of light away from you due to your space time warping. This also happens the nearer you are to a large mass. aka a black hole. It also warps the space time around you.
Alternate points of view... Take for example, you are traveling in a car at any speed. You pass cars traveling slower than you are. They appear to travel backwards. This is of course only relative to YOU. They are actually traveling forwards. If you think of yourself in the car as the speed of light, and the other cars as time, that's how it works. Of course, light travels SO fast that it bends TIME only relative to YOU. It's not like the whole world actually stops or slows down. It's only you who feels it. Just like overtaking a car. But that's only a simple explanation.
In laymans terms, traveling at light speed means that you are traveling at a speed greater than the speed of time. Therefore time is at a fixed rate, and the speed that light travels is at a fixed rate also. So to travel light speed actually gives you an advantage over time itself. It has been mathematically determined that the longer you travel at this speed, the more advantage you gain, so it would be possible for a child to travel at this speed for a computed time, and return to see that several generations have passed while he/she would have only aged the number of days / months traveled in spaceship time.
Another layman's view:Traveling at light speed really doesn't negate time. It is just that time is relative, as is velocity. My computer seems motionless to me, but an observer looking down at the solar system would see me and my computer moving quite rapidly. If you could get into a ship and accelerate to very near the speed of light and travel for ten earth years, your personal experience of time will not seem to you to have been any different from when you were on earth. Every moment would have passed normally for you, without anything seeming odd. It's just that at the end of the trip, you will have experienced it as only a fraction of the ten years. It will seem impossible to you that 10 years has gone by on earth. Time will have gone by differently for you than for earth. The same thing would happen even if you could reach the velocity of light. Upon decelerating, you would not report anything unusual regarding your experience of the passage of time; time will have passed for you as normally as ever. But you will notice that you spanned a huge distance instantaneously. You would find it nearly impossible to believe that dozens, hundreds or thousands of earth years had passed by during that instantaneous surge. From your vantage point in that ship, you could as easily ask: How does traveling at light speed accelerate time (for earth)? It doesn't.How do I make my space heater hotter?
To make your space heater hotter, you can try increasing the heat setting on the heater if it has adjustable settings. Make sure the heater is clean and free of debris, as this can affect its efficiency. Additionally, placing the heater in a smaller, enclosed space can help it heat up the area faster.
When to much stress is brought on by the build up of electrons in upper clouds and a lack of electrons from below, energy is released in the form of bright lights, thus creating lightning.
The sound that makes thunder is created when the lightning heats up the surrounding air in an instant making the gasses in the air explode, thus making the popping noise.
Since light travels faster than sound, that's why lightning is seen before thunder is heard.
Lead does corrode but it certainly does not corrode as easily as iron or steel. For example in electrolysis when you put metal in the water the bubbles start to form hydrogen and oxygen, this corrodes the metal. But lead will not corrode that easily in this process.
Lead may corroded by sulfuric acid; but generally lead is very resistant to corrosion.
What is an example of a compound machine?
A bicycle is an example of a compound machine, as it consists of various simple machines like wheels and gears working together to enable its functionality.
How do you get 20 brain age on brain age 2?
Rock Paper Scissors is the key game...I think you can only get 20 if you are under 1 minute and 4 seconds in Rock paper scissors and of course you have to do pretty well in the other two games too, but that is a lot easier. I now get 20 (or 21) about 90% of the time, unless I really mess up on one of the tasks.
