We humans find the colour red a warning because our instinct tells us to. The reason for this is because it's the colour of blood. This still remained from the time we were hunters.
The letters of the Greek alphabet, Alpha, Beta, Gamma etc., etc. both upper and lower cases, were used to represent numbers
Strobe lights are lights used to display regular flashes of light. They are often used in clubs/at concerts etc.
I am gonna take a stab at this and say, probably lights that are used when someone is returning home from a trip, military service,etc.
This is the electrical wiring that is used for lights, ignition, radio etc that is in a car
items in the book that have meaning such as the apple, a rainbow, etc.
A crucifix, a cross, an angel, etc. represent good. A serpent, a demon, etc. represent evil.
The army helmet is used to protect your head from danger, and like the skull, it's used to protect your brain from any danger; the vest is used to protect your heart, chest, etc., from gunshots and many more, and in a rib cage, is used to protect most of your internal organs such as your heart, lungs, etc.
red lights, lasers, vacuum tubes, some TV tubes, etc.
RIVER, STAGE, DREAM, DRAMA, ROAD, JOURNEY, etc.
Christmas lights can be purchased cheaply from specialist wholesalers such as DH Gate or Christmas Lights Etc. An alternative could also be to purchase used Christmas lights from others via Craigslist or eBay.
some type 'toys' used to try and represent math stuff. Little plastic disks used to represent whole numbers. Pie shaped figures cut into wedges to represent fractions. Plastic squares and rectangles to represent alg. expressions. Geometric figures, (flat) like triangles, rextangles, squares etc, and (solids) like cones, spheres, pyramids, box shapes, etc.
Yes they are, A lot of people buy them, I am one of them. LED lights are used for a lot of things such as: yards, flashlights, decoratives, and custom makings etc.