hi,here is the question:1. A lightning rod is a safety device that is meant to be hit by lightning. Charges tend to concentrate on the pointed end of the lightning rod. Explain why the lightning rod would draw the lightning to itself?please help me!!!thank you.have a great day!
I agree with minuteblue, you don't want anything that will reflect 100% of the image. If that were the case, you would just look into the projector! Instead you want a white or grey matte coating depending on what you are viewing. If the image is more dark than anything, then you want a grey surface since it reflects back darker colors closer to what there true color is. Lighter projections, you want a white screen. Some theaters paint their walls a light matte grey so you may want to test this on a test area to see if the image is any better. Good luck with your project.
Personally I would have at least three in my house which is small. The more rooms you have the more FE you need. Here are a few tips on buying FE's. You need to make sure that you get a Class B for the oil. Class c is for electrical fires and Class A is for plastics paper and such. Class B extinguishes flammable liquids, such as gasoline, oil and grease. Check each extinguisher's number rating. The higher the number, the larger a fire the extinguisher can put out. (A 4-A unit will put out twice as much Class A fire as a 2-A one.) A high number usually means a big, heavy unit. Disposable units ($10 to $20) are typically made of plastic and lose pressure after about 12 years. Good luck and it is great you are thinking ahead this might just save your life.
