Search: light

Number of results: 5,697

Physics - light
1. Blue light and yellow light combine to produce white light because they constructively interfere. Explain why 2. You shine yellow light on an object and it appears black. What color might the object be if illuminated by red light? Justify your response.
Sunday, May 1, 2011 at 12:32pm by Quinten

Physics - light
We did a lab and messed around with light. Yellow light was made up of green and red light, so combining it with blue made white light. But I dont know how it works
Sunday, May 1, 2011 at 12:32pm by Quinten

Physic
The tungsten filament emits white light, or the entire spectrum of colors of light. (look at any light bulb when its on). When the light is viewed with a spectroscope, it separates the white light into the different colors.
Tuesday, December 11, 2012 at 11:09pm by Jennifer

Physics
Subject: Light and Geometric Optics Question: Where must a light source be placed in front of a concave mirror for a) light energy to be concentrated to a single point b)the light to be reflected in a parallel beam?
Saturday, May 22, 2010 at 4:29pm by Emily

physic
Light is shone on a metal and photoelectrons are emitted. Can you tell me the three things from the list below which might cause the photoelectron emission to stop. Decreasing the intensity of the light Increasing the frequency of the light Decreasing the wavelength of the ...
Thursday, December 13, 2012 at 10:36am by vanya

physics
Light is shone on a metal and photoelectrons are emitted. Can you tell me the three things from the listbelow which might cause the photoelectron emission to stop. Decreasing the intensity of the light Increasing the frequency of the light Decreasing the wavelength of the ...
Monday, December 17, 2012 at 10:02am by centya

science
Light is shone on a metal and photoelectrons are emitted. Can you tell me the three things from the listbelow which might cause the photoelectron emission to stop. Decreasing the intensity of the light Increasing the frequency of the light Decreasing the wavelength of the ...
Friday, December 14, 2012 at 6:16am by centya

physiiics
Which of the following is correct for the two coherent light waves to produce zero light? The light waves should travel in perpendicular directions. The light waves are in phase with each other The light waves are out of phase with each other. The light waves should pass ...
Monday, February 11, 2013 at 9:34pm by ooommgggg

Science
1) the plants on the floor wouldn't get as much light, since the tree branches above them "hog" the light and cover the floor in shade. The floor leaves get less light, the canopy get more. 2) Sea grass in muddied water will have the same problem as 1). Their ...
Wednesday, November 21, 2012 at 4:44pm by marla

science
Electromagnetic radiation with a wavelength of 700 nm would be: a)x-rays b)red light c)violet light d)ultraviolet light e)microwaves I thought it would be visible light but that's not an option.
Sunday, September 12, 2010 at 5:49pm by Liah

Physics
When you approach a blinking source of light, the frequency of its blinking is seen to: decrease, increase, or remain the same always. I THINK IT IS INCREASING. If you are traveling at close to the speed of light and shine a flashlight out in front of you, a third observer at ...
Saturday, May 3, 2008 at 2:52pm by clark

chemistry-light
the SI Unit of length is meter,which is defined as the lenght equal to 1,650,763.73 wavelengths of light of the light emitted by a particuar energy transition in krypton atoms.calculate the frequency of the light to three significan figures.
Thursday, November 3, 2011 at 12:03am by nja

physical
Light is shone on a metal and photoelectrons are emitted. Can you tell me the three things from the list below which might cause the photoelectron emission to stop. Decreasing the intensity of the light Increasing the frequency of the light Decreasing the wavelength of the ...
Wednesday, December 10, 2008 at 12:24pm by trigger

Physics
A balloon appears to be yellow when seen in white light. Explain the colour it will appear in a) green light and b) magenta light. I really don't undestand the subtractive theory of light, and it applies to this question. Can you plese explain to me how to get the answer? ...
Sunday, April 25, 2010 at 12:03pm by Emily

Physics
Why is it necessary to collimate the light source before using the prism to disperse the light? A. If white light enters the prism with different angles, some of the blue light will exit the prism with the same angle as the orange light. B. If white light enters the prism with...
Monday, October 22, 2012 at 2:30am by Kyle

physics
A light year (speed of light 2.998x10^8 m/s) is the distance light travels in a year. How many meters are there in 1 light year? (Answer:9.45x10^15 m/yr)
Friday, September 10, 2010 at 4:20pm by Anonymous

Physical Science
These are two questions that I need help with: 1.What statement about light traveling through water and glass is true? A.Water and glass absorb different colors of light B.Light changes colors as it passes from water to glass C.Light travels at different speeds in water and ...
Saturday, May 9, 2009 at 11:37am by mysterychicken

physics
A diamond's index of refraction for red light, 656 nm, is 2.410, while that for blue light, 434 nm, is 2.450. Suppose white light is incident on the diamond at 32.2°. Find the angles of refraction for red and blue light. red light? blue light?
Tuesday, May 14, 2013 at 3:20pm by A

Physics
Which of the following is correct for the two coherent light waves to produce zero light? The light waves should travel in perpendicular directions. The light waves are in phase with each other. The light waves are out of phase with each other. The light waves should pass ...
Friday, October 19, 2012 at 2:04pm by Blah

physics-telescope
You are on the right track but do not appear to be solving for the separation distance of the galaxies from each other. Call that x. That is what they are asking for. 1.22 (lambda)/D = x/R where R is 10 million light years lambda = 400*10^-9 m D = 2.4 m Solve for x. If you ...
Wednesday, March 23, 2011 at 11:22pm by drwls

physics
Maxwell's equations proved that a. Light is a mechanical phenomena b. Light is a chemical phenomena c. Light is a phenomenal phenomena d. Light is an electromagnetic phenomena I think the answer is either a or d. But I'm pretty sure its d Thank you for any help and ...
Sunday, December 16, 2012 at 10:49am by Katie

Science
How does a periscope work when it has 2 mirrors and light? A.Lenses refract the light B.Light bends as it travels and mirrors bend the light more C.Light travels in a straight line and the mirrors reflect the light D.Lenses and mirrors reflect the light Reflect means to ...
Wednesday, March 21, 2012 at 6:57pm by Derrick

Science Help
How does a periscope work when it has 2 mirrors and light? A.Lenses refract the light B.Light bends as it travels and mirrors bend the light more C.Light travels in a straight line and the mirrors reflect the light D.Lenses and mirrors reflect the light Reflect means to bounce...
Wednesday, March 21, 2012 at 6:00pm by Derrick

Chem help?!
Which color light is diffracted at a greater angle, red light or yellow light?
Wednesday, November 14, 2007 at 5:33pm by Chuck

Chemistry
How does light energy work? Is red light the lowest? or is blue light?
Thursday, June 14, 2012 at 11:13pm by tfun

speed of light
i recently said that light goes as fast as i go because i am the light
Monday, August 21, 2006 at 9:12pm by jesus

Physical Science
In which of these cases does a ripe banana apear black, red light/green light or blue light? Why?
Friday, April 18, 2008 at 2:30pm by Rachel

speed of light
Can the speed of light be legislated? Explain your reasoning. As best as we know, the speed of light is a fundamental constant of the universe. I have no idea of the meaning "legislated". Someday they may pass laws and light will have to slow down. After the laws are...
Monday, August 21, 2006 at 9:12pm by Anonymous

Science
Yes, UV light has shorter wavelengths than visible light; IR light has longer wavelengths than visible light. UV light is more energetic, visible is next, IR has the smallest energy of the three.
Friday, September 10, 2010 at 11:44pm by DrBob222

physics ( help FAST)
if you were to move the light sencor in an experiment 5 times further from the light as it was before, by what fraction would the light intensity change????
Thursday, May 19, 2011 at 3:11am by D.J

Physics
A certain type of laser emits light that has a frequency of 4.7 1014 Hz. The light, however, occurs as a series of short pulses, each lasting for a time of 2.8 10-11 s. (a) How many wavelengths are there in one pulse? (b) The light enters a pool of water. The frequency of the ...
Thursday, April 25, 2013 at 10:10am by Anonymous

Physics
Does blue light or orange light have a larger index of refraction? Blue light is bent more by a prism than orange light. Does blue light or orange light have a larger index of refraction in glass? A. Blue B. Orange If you know the answer to this, could you also explain why? ...
Thursday, October 29, 2009 at 11:48pm by Jeff

Science grade 3
Does light always flow from light to dark places? T or False and explain. I say no becasue light shines and it does not flow Photons are emmitted and radiate in all directions until they are absorbed or reflected. So no is correct. They do not flow from light to dark. Thank you
Wednesday, May 30, 2007 at 12:01am by Marie

science- help needed.
each statement is false. rewrite each one as a true statement,showing as much scientific understand as possible. 1. light waves travel slower than sound waves. 2.a black object will reflect white light. 3.a translucent object lets no light through. 4.an orange object will ...
Sunday, November 30, 2008 at 7:49am by ruby127

SCIENCE
The light we see on earth is light from the sun. The earth rotates once every 24 hours. It is dark when the observer is on the side away from the sun. We may see some light due to the light reflected from the moon.
Thursday, September 6, 2007 at 8:55pm by DrBob222

physical science
The combination of red and green light makes yellow light. That is what hits the screen. Putting a blue object in the combined light beam removes the red and the green from the light that is reflected by the object. That leaves only black.
Wednesday, July 1, 2009 at 1:17am by drwls

science
Do they have to pass visible light? Do they have to be transparent? Almost anything that visible light can't pass through will also block uv light. There are a few exceptions, like black light filters (cobalt and nickel sulfate)
Wednesday, September 19, 2007 at 10:38pm by drwls

Physics
We hear people talk of "ultraviolet light" and "infrared light." Why are these terms misleading? Why are we less likely to hear people talk of "radio light" and "X-ray light"?
Friday, February 22, 2008 at 10:54am by Shirley

Chemistry
Purple light in the visible region of the electromagnetic spectrum has a shorter wavelength than does the green region of the spectrum. Which of the following can you conclude? Is it: a)a photon of purple light has a higher frequency than does a photon of green light or b) ...
Thursday, November 17, 2011 at 12:50pm by Lisa

physics
b. If you are cruising down the road at 50 mph and a policeman with a radar gun (wavelength 1 cm) reflects radar light off your bumper, what wavelength of radar light does he get back? Assume the policeman is stationary, and you are moving towards him. Light that gets ...
Sunday, April 15, 2012 at 11:38pm by DJ

physics
light is an electromagnetic wave and travels at a speed of 3.00 x 108 m/s. the human eye is most sensitive to yellow-green light which has a wavelength of 5.45 x 10-7 m. what is the frequency of this light?
Sunday, November 18, 2012 at 7:41pm by Joe

Physics - light
yes, that's what I'm saying. We mixed red and green to make yellow light, so that plus blue makes white light. But I don't understand how that and constructive interference have anything to do with eachother
Sunday, May 1, 2011 at 12:32pm by Quinten

Physics
When light travels from air to glass, which one of the following is not dependent on the index of refraction of the glass? A- The speed at which lught travels in the glass B- The angle through which light is deflected on entering the glass C- The frequency of the light in the ...
Monday, June 12, 2006 at 10:59am by David

physics
1.The greenish blue of water is evidence for the A) interaction between green and blue frequencies of light. B) reflection of red light. C) reflection of greenish-blue light. D) absorption of greenish-blue light. E) absorption of red light. 2.Atmospheric refraction tends to ...
Thursday, May 22, 2008 at 11:35pm by Sandhya

Physical Science
I need help with some of these questions: 1.If you look at a red leaf, what describes what happens when you see it? A.The leaf absorbs red light from our eyes B.Our eyes reflect red light back to the leaf C.Red light reflected from the leaf enters our eyes D.The leaf radiates ...
Saturday, May 9, 2009 at 11:17am by mysterychicken

Chemistry
I don't know what the 5.878E12 miles/light year is or why you need it. 4.4 light yrs x 9.460E12 km/1 light yr x 1 mi/1.61 km = ?? miles. You can check this out by gong to google and typing in "4.4 light years to miles" without the quotation marks and hit the ...
Wednesday, September 28, 2011 at 12:10am by DrBob222

Math
Daphne replaced light bulbs in her mothers store.She had 3/4 of a box of light bulbs. She used 1/3 of the bulbs. a. What fraction of the box of light bulbs was left? b. How many light bulbs are in a full box? Explain. Thanks to everyone who helps answer questions it is ...
Thursday, October 25, 2012 at 11:46am by Cherie

Physics
Two stars are 8 light years from earth (a light year is the distance light travels in one year). The 550 nm light from the two stars can be barely distinguished in the diffraction pattern of 90 cm wide single slit. How far apart are the stars?
Wednesday, May 2, 2012 at 8:24pm by jackmo

Physics
Which of the following is an example of diffuse reflection? light reflected from the surface of a dry asphalt roadway light reflected from the surface of a calm lake light reflected from the surface of glossy paper light reflected from the surface of a shiny metal plate
Monday, October 29, 2012 at 3:24pm by Confused

Physics
So the cars will reflect blue light, but since no blue light is being emitted, they won't look blue? Since yellow light is a combination of red and green light, no blue is involved. One will not be able to see the police cars??? Thank you for your help!! :)!
Sunday, April 20, 2008 at 5:43pm by Corin

physics/light reflection
A light of ray is incident at an angle of 58degrees on the plane surface of a block of glass of refractive index 1.60. Some light is reflected on the other side of the normal at the same angle as the angle of incidence. Find: a.the angle between the light reflected from the ...
Wednesday, October 24, 2012 at 11:41am by Help please

analogies
furnace:fireplace::lamp: ? log,street light,light bulb, headlight,candle is light bulb correct?
Monday, April 11, 2011 at 6:55pm by sally

Geometry
A 195 cm person casts a 2.1 m shadow in the light of a street lamp. If the person is standing 4.2 m from the light, how tall is the light?
Sunday, September 12, 2010 at 6:43pm by Cindy

biology help
Is photosynthesis only occurring during the daytime? What happens when there is no light? What is the relationship between light dependent and light independent reactions in photosynthesis?
Sunday, July 10, 2011 at 11:02pm by miyagi

physical science
describe your motio when you are on a swing in terms of kinetic and potetial energy. at which point during your motion is each type of energy the greatest Potential energy is hghest when the elevation is highest. Potential energy is lowest (and kinetic energy highest) when the...
Tuesday, January 9, 2007 at 8:20pm by allie

calculus
A light house is 1 km off shore. A marathoner is running along the shore. The search light on the light house is rotating at a rate of 1/6 revolution per minute when the runner is 3 km from the point on the shore that is the closest to the light house.The runner is illuminated...
Tuesday, March 25, 2008 at 11:04pm by samir

physics
Suppose the time taken for light to bounce to and fro between the parallel mirrors of a light clock is 1 second, in the frame of reference of the light clock. As seen by another observer moving at high speed at right angles to the to-and-fro motion of the bouncing light, the ...
Thursday, December 8, 2011 at 12:40am by lisa

chemistry
In the first place, I have no idea what FECNS+ is. For an absorbance measurement, don't you think fingerprints will (a) absorb some of the light, (b) scatter some of the light, or (c) react somehow with the light?
Sunday, March 20, 2011 at 5:01pm by DrBob222

Science
*shape of the galaxy *size of the galaxy *The sun's light *light reflection from earth *light pollution But what would be the factors? I can't write lack of darkness during the day.
Monday, February 22, 2010 at 7:23pm by Sara

Electricity
The best answer is c, but a is also true if the wavelength of the light is chosen correctly. The intensity of the light does not determine the emission of the electrons, the wavelength (energy of light photons) is what determines. c
Saturday, August 20, 2005 at 4:56pm by bobpursley

Math
A consumer buys n light bulbs, each of which has a lifetime that has a mean of 800 hours, a standard deviation of 100 hours, and a normal distribution. A light bulb is replaced by another as soon as it burns out. Assuming independence of the lifetimes, find the smallest n so ...
Wednesday, April 27, 2011 at 1:17pm by Lo

reading
This is a simile. He is comparing the street light to a moon being held in an iron fingered hand. The light itself is round. The container for the light looks like iron fingers.
Thursday, March 26, 2009 at 2:58pm by GuruBlue

physics
Laser light is commonly used to demonstrate double-slit interference. Explain why laser light is preferable to light from other sources for observing interference. Doesn't double slit interference work best on monochromatic light? yea
Friday, April 27, 2007 at 4:22am by anonymous

Physics
Rank in order the following according to their speeds, from fastest (1) to slowest (5): (i) 425-nm-wavelength light through a pane of glass, (ii) 500-nm-wavelength light through air, (iii) 540-nm-wavelength light through water, (iv) 670-nm-wavelength light through a diamond, ...
Saturday, February 2, 2013 at 2:53pm by Cassie

physics
A 75 W light source consumes 75 W of electric power. Typically only about 5% of this energy is emitted as visible light of wavelength 600 nm. (a) Calculate the frequency of the emitted visible light. (b) How many photons per second of visible light does the source emit? (c) ...
Friday, October 21, 2011 at 10:32am by A 75- light source consumes 75 of electrical power. Assume all this energy goes into emitted light

physics
In astronomy, distances are often expressed in light-years. One light-year is the distance traveled by light in one year. The distance to Alpha Centauri, the closest star other than our own sun that can be seen by the naked eye, is 4.7 light-years. Express this distance in ...
Monday, March 3, 2008 at 8:41pm by rick

math
mr foster places 11 garden light along 80- meter path.each light an eqal distance apart .haw far away is the sixth garden light from the second?
Saturday, February 4, 2012 at 7:12am by omraan

Trig
a sailor out in a lake sees two likght houses 11km apart along the shore and gets bearings of 285degrees from his present position for light house A and 237degrees for light house B. From light house B, light house A has a bearing of 45degrees. How far to the nearest kilometre...
Wednesday, July 21, 2010 at 10:02pm by Sonia

light
The Index of Refraction is the ratio of the speed of light in a vacuum to the speed of light in some other material. The speed of light is highest in a vacuum.Therefore, the index of refraction is always greater than 1. Answer: d.
Tuesday, July 20, 2010 at 3:00pm by Henry

speed of light
The meter is defined as the distance light travels in 1/2.99792458×108 seconds. This definition requires that the speed of light be accurately known. This speed can be measured with high precision and is defined to be exactly 2.99792458×108 meters/second. Thus the ...
Monday, August 21, 2006 at 9:12pm by Anonymous

algebra
A light-year is the distance that light travels in one year. Find the number of miles in a light-year if light travels 1.86 × 105 miles/second. (Round to one decimal place, and assume that there are 365 days in a year.)
Friday, March 12, 2010 at 3:10pm by larry

science
light trsavels at 3*10 m/s. an astrounaut shines a flash light in space. 4 hours later a martian sees a light from the astrounaut. how far away is mars from the astrounaut?
Wednesday, April 17, 2013 at 10:42am by allison

Phy
The index of refraction for a diamond for red light of wavelength 655 nm is 2.35, while that for blue light of wavelength 437 nm is 2.26. Suppose white light is incident on the diamond at 29.5. Find the angle of refraction for red light. Answer in units of
Saturday, February 18, 2012 at 7:30pm by Joila

English
1. This uses the adverb "really" 2. This uses the adjective "real" and is not good. 3. OK and fun is a noun 4. the light has to be above 5. the light is somewhere toward the back 6. the light could be anywhere 4, 5, 6 are all fine grammatically but there &...
Friday, March 19, 2010 at 9:39am by SraJMcGin

Trig
Ok but do think u can help me with this question: a sailor out in a lake sees two likght houses 11km apart along the shore and gets bearings of 285degrees from his present position for light house A and 237degrees for light house B. From light house B, light house A has a ...
Wednesday, July 21, 2010 at 7:07pm by Sonia

brain teaser
You are standing outside a closed door. On the other side of the door is a room that has three light bulbs in it. The room is completely sealed off from the outside. It has no windows and nothing can get in or out except through the door. On the outside of the room there are ...
Wednesday, September 14, 2011 at 3:07am by Tony

MATH
A light year is the distance that a light travels through a vacuum (space without matter) in one year. A light year is about 9.46 x 10^12km. The distance to the spiral galaxy NGC 4603 is about 1.08 x 10^8 light years. What is the distance in km?
Thursday, March 31, 2011 at 8:48pm by Maria

a
Consider what you have learned so far about the use of light in medieval, African, and North American buildings and artworks. Select a specific example, fully identified, and address the following in your discussion posting: How was light and height used in the art and ...
Wednesday, May 2, 2012 at 12:47pm by janvert

psychology
* Take about 15 index cards and a flashlight that is opaque on all sides (so that light shines only through the front) into a very dark room. * Place all 15 cards over the beam of light. * Slowly remove the cards one at a time until you can barely detect the light, and then ...
Tuesday, March 30, 2010 at 7:13pm by ingrid

math
A street light (light source) is 15 m above the ground. A ball is freely released from a location of 9 m from the light with the same elevation as the light’s. While the ball is falling, it casts a shadow on the ground. Assuming the gravity is 10 m/s2, calculate the speed...
Wednesday, August 8, 2012 at 10:29am by rolan

Physical Science
Galaxy A is 600 million light years from earth. Galaxy B is moving away from the earth at a speed that is 80% as large as that of Galaxy A. How far from earth is Galaxy B? A. 750 million light years. B. 640 million light years. C. 540 million light years. D. 480 million light ...
Thursday, October 27, 2011 at 1:07pm by Anonymous

Physics
two narrow slits 0.12 mm apart. Light of wavelength 550n illuminates the slits, causeing an interference pattern on a screen 1.0 m away. Light from each slit travels to the m = 1 maximum on the right side of the central maximum. How much farther did the light from the left ...
Sunday, February 10, 2008 at 11:48pm by Brad

physics
A light bulb is wired in series with a 133-Ω resistor, and they are connected across a 120-V source. The power delivered to the light bulb is 22.5 W. What are the two possible resistances of the light bulb?
Tuesday, January 25, 2011 at 2:06pm by joe

physics
You are in the lab with a 10 V battery. You have a 10 W light bulb and you want to put 1/2 A of current through the light bulb and 5 V across the light bulb. This will allow the light bulb to have a brightness proportional to 2.5 W. Assuming any resistors that you need, design...
Tuesday, February 26, 2013 at 6:13pm by jamie

physic
past tense of transitive "shine" is "shined" (the sun shone as the man shined his shoes) light intensity has no effect on emission, so we want to decrease the energy: Increasing the wavelength of the light Decreasing the frequency of the light or Changing ...
Thursday, December 13, 2012 at 10:36am by Steve

Astronomy
Few question about astronomy: 1.how many centimetres is equivalent to a light-nanosecond 2. How long is an astronomical unit (AU) in light-minutes (1min, i.e., the distance that light travels in a vacuum in one minute)? Please show the calculation if there is any Thanks
Tuesday, September 13, 2011 at 5:07am by KD

7th Grade Language Arts
oh one more question- In which sentence is the phrase "shine a light" used figuratively? (1 point) Open the hood of the car and shine a light onto the engine to check for a leak. Since this was the third time her bike had been stolen, Kristen wanted to shine a light ...
Monday, April 1, 2013 at 8:59pm by Anonymous

Physics
A 75 W light source consumes 75 W of electric power. Typically only about 5% of this energy is emitted as visible light of wavelength 600 nm. (a) Calculate the frequency of the emitted visible light. (b) How many photons per second of visible light does the source emit? (c) Is...
Monday, April 28, 2008 at 3:54pm by J

Introduction to Electricity and Circuits
A light bulb is wired in series with a 142 resistor, and they are connected across a 120 V source. The power delivered to the light bulb is 22.3 W. What are the two possible resistances of the light bulb?
Sunday, February 6, 2011 at 10:28pm by Jiji

physics
Red light (n = 1.520) and violet light (n = 1.538) traveling in air are incident on a slab of crown glass. Both colors enter the glass at the same angle of refraction. The red light has an angle of incidence of 26.50°. What is the angle of incidence of the violet light?
Wednesday, March 7, 2012 at 8:20pm by DCM

Physics
Red light (n = 1.520) and violet light (n = 1.538) traveling in air are incident on a slab of crown glass. Both colors enter the glass at the same angle of refraction. The red light has an angle of incidence of 26.50°. What is the angle of incidence of the violet light?
Tuesday, March 6, 2012 at 9:00pm by DCM

Astronomy
<< The only type of electromagnetic radiation that is actually considered light is visible light. >> It depends upon whom you are talking to. The eye can see a bit below 400 nm and a bit above 700 nm, but with rapidly decreasing sensitivity. The ...
Wednesday, November 9, 2011 at 11:17pm by drwls

Physics
A index of certain type of glass has an an index of refraction of 1.66 for red light and 1.65 for violet light. If a beam of white in air approaches the glass with an angle of incidence of 49.0 degree, by what angle will the red light be separated from the violet light inside ...
Sunday, December 16, 2012 at 8:32pm by Hanu 2012

Physics
UV light has more energy than visible light; therefore, the UV light has the potential to move the electrons far enough so that the electrons are in an ionized state.
Thursday, March 27, 2008 at 11:47pm by DrBob222

college physics
You are in the lab with a 10 V battery. You have a 10 W light bulb and you want to put 0.75 A of current through the light bulb and 7.5 V across the light bulb. This will allow the light bulb to have a brightness proportional to 5.625 W. Assuming any resistors that you need, ...
Tuesday, February 26, 2013 at 6:20pm by michelle

physics
Neon is a gas, which is a fluid. The light from a neon light is not a fluid. It is electromagnetic radiation of certain wavelengths, traveling at thwe speed of light.
Wednesday, January 26, 2011 at 7:37am by drwls

Physics Plz help me
If a galaxy is traveling away from us at 2.0% of the speed of light, roughly how far away is it? t= light years I got 2.4x10^8 light years but its wrong please help me out...thank you
Monday, May 6, 2013 at 7:18pm by Leila

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