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Flashlights
Usually battery powered, flashlights are a portable means of creating artificial light. They allow a person safer navigation through darkened areas.
687 Questions
4A,
P=IU
I = P/U
I= 6.0W/1.5V
I=4A
or let the units help you:
P(power) in measured in J.s-1 and I (current) in C.s-1, and U(potensial difference) in J.C-1 thus you have :
I (C.s-1) = P(J.s-1 )/U(J.C-1 ) = I(s-1/C-1) =I(C.s-1)
What geometric term best describe the light that shines from a flashlight?
If on your paper your answers are point, ray, line segment, or plane i think it will be Plane
Would battery be the independent variable and flashlight dependent variable in an experiment?
Nope. Dependent Variable is the variable that is being tested/measured while Independent variable is the variable is that can be changed.
Did flashlights exist during Sherlock Holmes?
No. They used what was known as a dark lantern (aka bull's-eye) which had a shutter to hide the internal flame.
P=v*i i=p/v=0.5/3=1/6 (a)
Where is the fuse for a 2007 BMW 328i rechargeable flashlight located?
It's located in the glove compartment, on the left side.
Where is the energy source for a flashlight?
A dry cell; it contains chemical energy.
A dry cell; it contains chemical energy.
A dry cell; it contains chemical energy.
A dry cell; it contains chemical energy.
Where is a fuse located in a flashlight?
I have never seen a flashlight with a fuse.
UK residents would call a flashlight a torch.
Who makes Lumistar flashlights?
The HERO-LED COMPANY makes high quality led flashlights. LUMISTAR is their own flashlight brand name.
But there is a difference with other "Lumistar flashlights". Some people say lumistar flashlights, that means the led bulb is made by the LumiLEDs Inc, PHILIPS. But the HERO-LED COMPANY has a brand name of LUMISTAR Flashlight. They currently only use CREE Q5 LED bulb and incorporated with digital circuit that has 5 brightness settings and high quality and durable flashlight.
What is the weight of the first flashlight?
The first flashlight weighed more than six pounds and had a handmade battery that was half a foot long!
High road by broken bells
orange maybe
Ghost Adventures S02E07,or also known as "Moon River Brewing Company".
What does A 170 lumen flashlight equal in a watt flashlight?
The energy consumption of a modern Cree XP-G or XM-L based flashlight with 170 lumen output can be as low as 1.4 watts with 120 and more lumen per watt. The light output will be approximately equal to a 20 W tungsten incandescent light bulb or a 10 W halogen light.
Why do soldiers in Vietnam carry red flashlights?
"Red lights are used in photography dark rooms, military bunkers, submarines, and anywhere you might find yourself working in the dark. It gives you light to see, while at the same time keeping your eyes adjusted for the dark."
from Great Outdoors website.
What parts are needed to make an ever-lasting flashlight?
Materials
- 2 D cell batteries [use alkaline instead of heavy-duty (carbon-zinc) batteries]
- (2) 5" pieces of number 22 insulated copper bell wire with approximately 1" of insulation stripped off all ends
- Cardboard tube (toilet tissue or paper towel) cut to 4" in length
- PR6, or number 222, 3-volt flashlight bulb
- 2 brass fasteners (brads)
- 1" x 3" cardboard strip
- Paper clip
- Tape
- Bathroom-size paper cup
Procedures
- Push brass fasteners through tube. Attach a paper clip. This clip will be like an on and off switch.
- Inside the tube, attach a wire to each brass fastener. Tape batteries together and insert one into each tube, (+) to (-).
- Tape one end of wire very securely to bottom of one battery's negative (-) terminal.
- Pass other wire end through a hole (large enough to insert light bulb) in center of cardboard strip. Then twist the wire around bulb and insert the bulb into cardboard strip. This strip, when taped to tube, will position bulb for contact to positive (+) terminal.
- Use a paper cup as a reflector by inserting bulb through a hole punched in bottom of cup. Tape securely.
HAVE FUN.
DO NOT USE HOUSEHOLD ELECTRICAL CURRENT! IT MIGHT SHOCK AND KILL YOU!!!
science quiz+the answer is chemical - electrical - light
It doesn't matter, unless we're talking about some bulbs with integrated switching power supplies, in which case it might make sense to offset (distance) them by about (SwitchingFrequency / NumberOfBulbs) Hz, to make the general load appear mostly resistive. But in about 99.9% of the cases, the placement of a load (and a light bulb is a load) does not change the amount of current it uses as it's a property of the light bulb itself.
Of course, with LED lights it's possible to "go creative" with the placements of the LEDs and their resistors in such a way as to minimize current draw and power dissipation through heat, but I fear the gains would very well be rather negligible. Also, in-depth knowledge of said resistors and LEDs would be needed if someone were to undertake such an endeavour.
What is the energy conversion of a flashlight battery toaster and motor?
Flashlight: electrical energy -> radiant energy
Battery: chemical energy -> electrical energy
Toaster: electrical energy -> heat energy
Motor: electrical energy -> kinetic energy
