0
How To
Do you have a question about how to do something? Looking for a handy guide? This Topic is for people to find "How To" guides to solve their problems, and for people who like to write guides and help others solve their more complex problems.
25,034 Questions
If you are talking about a tornado, this is already a scale in place-The Fujita scale (F-Scale), or Fujita-Pearson scale, is a scale for rating tornado intensity, based on the damage tornadoes inflict on human-built structures and vegetation. The official Fujita scale category is determined by meteorologists (and engineers) after a ground and/or aerial damage survey; and depending on the circumstances, ground-swirl patterns (cycloidal marks), radar tracking, eyewitness testimonies, media reports and damage imagery, as well as photogrammetry/videogrammetry if motion picture recording is available.
The wind speed is measured by a system called VORTRAC (Vortex Objective Radar Tracking and Circulation), was successfully tested by the hurricane center last year.
"VORTRAC is an excellent example of the application of basic research to help improve short-term hurricane warnings," says Steve Nelson, program director in NSF's Division of Atmospheric Sciences.
The system, which relies on existing Doppler radars along the U.S. coast, provides details on hurricane winds and central pressure every six minutes, indicating whether the storm is gathering strength in the final hours before reaching shore.
How to calculate pH of 1N HCl solution?
The pH of a 1N HCl solution can be calculated using the formula pH = -log[H+], where [H+] is the concentration of H+ ions in the solution. For a 1N solution of HCl, the concentration of H+ ions will be 1M, so the pH will be -log(1) = 0.
To make MRS-maltose agar, you would mix MRS agar base with maltose powder according to the manufacturer's instructions. Autoclave the mixture to sterilize it, then pour it into Petri dishes to solidify. This medium is commonly used for culturing lactic acid bacteria.
How to stop copper from rusting?
To prevent copper from rusting, you can apply a protective coating such as lacquer or varnish to create a barrier between the copper and the environment. You can also keep copper dry and clean to avoid oxidation. Regularly polishing the copper can also help maintain its appearance and prevent rusting.
How to separate oxygen gas from hydrogen gas?
One way to separate oxygen gas from hydrogen gas is by using fractional distillation. This method takes advantage of the differences in boiling points between the two gases. As the mixture is heated, the gases will vaporize at their respective boiling points, allowing them to be collected separately. Another method is through electrolysis, where an electric current is passed through water to break it down into its constituent gases.
How to convert density to mass?
To convert density to mass, you need to know the volume as well. The formula to calculate mass from density and volume is mass = density x volume. Multiply the density of the substance by the volume in cubic units to get the mass in units of mass (e.g. grams, kilograms).
How to cool a glass of hot liquid?
You can cool a glass of hot liquid by placing it in the refrigerator or adding ice cubes. Another option is to place the glass in a bowl of cold water or wrap a wet cloth around the glass and let it sit for a few minutes. Stirring the liquid can also help distribute the heat and cool it down faster.
How to make 6N HCl from concentrate?
Normality is equal to molarity if only a single hydrogen is involved, which fortunately it is.
35% HCl contains 350 grams of HCl per 1000 grams (or ml) of water. What is desired is 10 ml of a 6 Normal (or molar) solution. The molecular weight of HCl is 36 grams/mole, so 6 normal would be 216 grams per 1000 mls. This is equivalent to 2.16 grams per 10 milliliters (1000 ml = 1 liter). 35% HCl contains 0.350 grams per ml, so one would need 6.17 ml to give 2.16 grams. The other 3.82 ml will be pure water.
Accordingly you can prepare as much quantity as you require.
Iron oxide can be reduced by using a reducing agent such as carbon monoxide or hydrogen gas in a controlled environment with limited oxygen. This process strips oxygen atoms from the iron oxide, producing elemental iron. The reduced iron can then be separated from the remaining products through various techniques.
Add dilute nitric acid and silver nitrate
Result - A white precipitate
Added:
...... but be aware that Bromide and Iodide (and some other anions) will react almost accordingly. So it isn't too specific!
However, if you look very closely, the bromide ion turns a cream coloured precipitate, and the iodide ion, a yellow precipitate. Silver chloride and -bromide will turn in grey black after some time exposed to light (photographic illuminate-reaction)
How to make a soda bottle rocket?
To make a soda bottle rocket, you will need a 2-liter soda bottle, a cork, a bike pump, water, and a launch pad. Fill one-third of the bottle with water, attach a cork to the opening, and place the rocket on the launch pad. Pump air into the bottle using the bike pump, quickly remove the cork, and watch it soar!
How to change electric goggle lens?
To change an electric goggle lens, you typically need to locate the release mechanism on the frame, which can vary depending on the brand and model. Once you have found this release mechanism, you can follow the manufacturer's instructions to detach the existing lens and attach the new one securely. Be sure to handle the lens carefully to avoid scratching or damaging it during the replacement process.
How to change ge stove from natural gas to propane gas?
a special valve or converter is NOT necessary. typically the stove burners each need a newer smaller orifice. they are litle socket type brass fittings about 1/4" in diameter (the hole, the orifice, is much smaller)
the new orifice can be bought at a applaince part distributor or on-line.
the oven typically justs needs an adjustment. no replacement parts are necessary
A Flying Teabag (apart from its more obscene meaning) can be made by following these steps: 1. Get a teabag 2. Remove the metal clip and empty its contents 3. Form it into the shape of a cylinder 4. Place it upright on a flat surface 5. Burn it from the top. After a while, the burning teabag will start to rise as it is less dense than air.
Unfortunately, bleach stains are permanent as the bleach removes the color from the fabric. One possible solution is to dye the fabric to cover up the bleach stain or use a bleach pen to create a design that incorporates the stain. Alternatively, consider using a fabric marker to color in the affected area.
How to Find the centroid of the tetrahedron with 4 corners whose density function is given?
To find the coordinates of the centroid of the tetrahedron whose vertices are (x 1 , y 1 , z 1 ), (x 2 , y 2 , z2 ), (x 3 , y 3 , z3 ) and (x 4 , y 4 , z4 ).
Let A( x 1, y 1, z 1), B( x 2, y 2, z 2), C( x 3, y 3, z 3), D( x 4, y 4, z 4) be the vertices of tetrahedron ABCD. If G 1 is the centroid of ?BCD, then its coordinates are
Since G( x, y, z), the centroid of tetrahedron ABCD divides the line AG 1 in the ratio 3 : 1.
?
Similarly,
Hence the centroid is
SOLN BY GAURAV CHOUDHARY
How to calculate helmholtz free energy for ideal gas?
The Helmholtz free energy (A) for an ideal gas can be calculated using the equation (A = -RT \ln(Z)), where (R) is the ideal gas constant, (T) is the temperature in Kelvin, and (Z) is the partition function of the ideal gas. The partition function for an ideal gas is given by (Z = V \left(\frac{2\pi mkT}{h^2}\right)^{3/2}), where (V) is the volume, (m) is the mass of a gas molecule, (k) is the Boltzmann constant, and (h) is the Planck constant.
How to wire incandescent light fixture with black and white wiring is it wired to ground?
== == === === By asking this question you are probably not quite ready to take on this particular task.
The correct answer to your question will depend on the exact location of the light fixture, its voltage and its power rating. <><><> Whatever is going on, your present wiring situation is not just confusing, it is dangerous. The bare wires are not meant to carry current. They are not coated, and thus have no insulation to protect surrounding material from the heat created by electrical current passing through the wire. You need to cut the whole circuit off at the breaker box until you can get the situation sorted out. Otherwise, you could have an electrical fire. This is what is wrong. At some point in your circuit, some numbskull (probably not a professional electrician) connected something wrong. The thing about electrical circuits is, the current doesn't know what color wire it is travelling through. It travels just as easily across black, white, red, and bare wires. In fact, there is no real difference between any of the wires, except that the "ground" wire has no coating. Electricians use the coating colors so they can keep track of which is which. So it's really more appropriate to talk about hot, neutral, and ground wires than black, white, and bare wires. All the wires could have the same color coating, and the circuit would still work fine. The problem is, if you were trying to hook something up, you wouldn't know which wire was hot. So someone got smart and color coded the wires. By standard, electricians use the black wires for hot and the white wires for neutral, but only because they assume that everyone else does. If the previous "electrician" didn't, it screws everything up. And that's what happened here. Someone did something that was not according to standards. I would start with the switch box that controls this light fixture. There should be two bundles of wires coming into this box. Each bundle will have a black wire, a white wire, and a bare wire. The two white wires should be connected to each other, but not to the switch itself. The two black wires should be connected to the switch. The switch will have two brass screws on one side. The black wires should be bent into a hook and hooked around those two screws and the two screws tightened. It doesn't matter which is on top and which is on bottom. The two bare wires should be connected to each other, and IF the switch has a green screw at the very bottom, the two connected bare wires should be connected to that green screw. That's how everything SHOULD look. But, it may not be that way, which would explain why your light doesn't hook up correctly. You may have a black wire and white wired connected to the two brass screws, instead of two black wires. You may have a bare wire connected to one of the brass screws. You may have a white wire and a bare wire connected to each other. All of these are no-nos. Anything other than what I described above is unacceptable. Hot and Neutral are reversed. You should not be getting any voltage through the ground wire ... EVER !!
On many light fixtures the black and white colors do not matter, except as a safety standard; it should work either way. Typically, however, the black goes to the tip of the bulb and white (neutral) to the shell, for safety when the bulb is being replaced and the current may be on. If the light fixture has a switch, it should always switch the black (hot) connection.
In your case, the white to ground means that the "neutral" may have been accidentally reversed somewhere with the black (which should never happen), leaving the safety grounding wire as the only connection that will "work." It also could mean that the voltage is still "on" when the switch is off, and a person could be electrocuted by "completing" the circuit even with the switch "off". <><><>
As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed. Before you do any work yourself,
on electrical circuits, equipment or appliances,
always use a test meter to ensure the circuit is, in fact, de-energized.
IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB
SAFELY AND COMPETENTLY
REFER THIS WORK TO QUALIFIED PROFESSIONALS.
How to chemically treat a new above ground pool?
To chemically treat a new above ground pool, you will have to add chlorine to the pool. You will also have to test your pool water to see where the PH is. Depending on the reading that you get, you will have to add PH plus, or PH minus to the water.
Shelley Hill Pools has over 40 years of experience providing in ground, concrete, indoor, built in, and infinity pools, in new york, hudson valley. Our focus on quality and aesthetics has made us one of the leading providers of high-end pools in the community, which is why we are the top choice for many of your neighbors. you can look us up at shelleyhillswimmingpools.com
Run your filter as you add these chemicals to the pool. You should also add stabilizer to the water. This will help keep the chlorine stay in the water for longer periods of time. Without it, you will have to add chlorine much more often.
How to reduce frictional force?
To reduce frictional force, you can use lubricants such as oil or grease to create a slippery layer between surfaces. You can also use smoother materials or surfaces, or apply a force perpendicular to the surfaces to reduce the contact force. Lastly, minimizing surface roughness and keeping surfaces clean can also help reduce friction.
How to Remove chlorine from skin?
Shower with warm water and rinse yourself for a full minute before applying a sudsy, moisturizing body wash with a loofa. Allow the soap to stay on for a few minutes before rinsing off. Then dry and lotion with a non-scented lotion. Then apply perfume, cologne, or any other scent you wish. Finally change into fresh clothes, as you should after showering.
How to help someone get over an ex?
You're really a very good friend or possibly a prospect at a later date regarding a relationship with this person. Whatever, it's nice you care enough. Unfortunately, when there is a painful breakup it's much like grieving over the loss of a loved one that has died. In ways the ex that was in your friend's life has died. They no longer are part of them. It takes time and patience, but trust me when I say that in time they will get over it, meet someone else and all will be well again for them. Just hang in there and listen or take them out for a bit of fun. They may sit there looking sad and disinterested for awhile, but eventually they will come around and be their old self again.
How to get rid of salmonella from black pepper?
To get rid of Salmonella from black pepper, you can consider heating the black pepper to 165°F for at least 15 seconds to kill the bacteria. Additionally, storing black pepper in a cool, dry place and using clean utensils can help prevent contamination. It's also important to buy black pepper from a reputable source to reduce the risk of Salmonella contamination.
In order to maintain soil fertility you have to add nutrients back into the soil that plants have used. This could be done by using organic methods, or by using fertilizers. The amount needed depends on the type of plant that is being grown and the level of depletion in the soil
How to find the volume of a curved cylinder?
a way is you can use Archemedes principle and fill a glass of water bigger than the cylinder to the top. then place the glass in a bowl. carefully place the cylinder in the glass and make sure you submerge the whole cylinder.take the bowl with the water in it and pour it into a measuring cup and see how much water it is. that will be the volume of the cylinder.
