flashlight is always lighting for people in dark. There are other more applications from differrent color light, such as imalent flashlight, spot light is for daily use, UV light can check ID card or ticket, red light can be used warning in traffic.
the sponge wasn't invented by man but remodelled. originally people used sea sponges. from a kiwi girl of knowledge
To keep things cold. Before they invented refrigerators, they used cellars to cool things. A cellar is underground and is made from rocks, so it was cooler. And so our food stays edible!
It is not known exactly when the sundial was invented, or what people invented it. Sundials can be found in many ancient civilizations, including the Babylonian, Greek, Egyptian, and Roman ages.
For a 5 C cell flashlight, a bulb typically rated for 6 volts is commonly used, as C cells are generally 1.5 volts each, adding up to 7.5 volts total. However, many flashlights are designed to operate efficiently with a 6-volt bulb to accommodate variations in battery performance and ensure optimal brightness. Always check the specifications of your specific flashlight model for the recommended bulb type and voltage.
The flashlight was invented in the late 19th century, around 1899, by British inventor David Misell. He patented the first ever flashlight design, which used a battery, bulb, and a small incandescent light in a tube.
People used their feet to get around.
before planes were invented people used boats to travel and pigeons as messengers
We used letters.
they used ruber bands
They used only themselves.
they used books
foot,wagon
The first wind-up flashlight was invented in the late 1890s by an inventor named David Misell. The flashlight used a combination of a spring mechanism and gears to generate power through manual winding, eliminating the need for batteries.
they used ipod nano's..
Before decimals were invented, people used fractions.
Glass was used before film was invented.