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April 17, 2014

Search: Math/physics

Number of results: 322,142

winterWx
A 0.30-kg softball has a velocity of 12 m/s at an angle of 30 below the horizontal just before making contact with the bat. What is the magnitude of the change in momentum of the ball while it is in contact with the bat if the ball leaves the bat with a velocity of 17 m/s, ...
Friday, February 23, 2007 at 2:45am by Physics/Math

winterWx
A soccer player kicks a soccer ball of mass 0.45 kg that is initially at rest. The force of the kick is given by F(t) = [(5106)t - (2.5109)t2] N for 0 ≤ t ≤ 2.010-3 s, where t is in seconds. (The player's foot is in contact with the ball for 2.010-3 s.) Find ...
Friday, February 23, 2007 at 2:47am by Physics/Math

winterWx
Compute the rms speed of a nitrogen molecule at 31.0C. At what temperature will the rms speed be half that value? At what temperature will the rms speed be twice that value? T = 31 C = 304 K Mass M = 28 g/(6.02*10^23) = 4.65*10^-23 g = 4.65*10^-26 kg The average kinetic ...
Friday, February 23, 2007 at 2:48am by Physics/Math

winterWx
What is the average translational kinetic energy of nitrogen molecules at 1500 K, in the following units? (a) J (b) eV I already provided the formula for average KE in Joules, in an answer to a separate question of yours. average KE = (3/2) k T 1 eV = 1.602*10^-19 Joules Note ...
Friday, February 23, 2007 at 2:48am by Physics/Math

11th grade ???
What is your school SUBJECT? Math? Physics?
Sunday, September 28, 2008 at 4:49pm by Ms. Sue

tatiana
A car tire of radius 45cm turns at a constant 14 rads/s. For a point on the edge calculate a) the tangential V b) the tangential a c) the centripetal "a" work: a) v= rw v= .45m * 14 rads/s= 6.3m/s b) at=alphar alpha= w/t I am unsure how to get time? c) at= w^2r at= 14^2 * .45 ...
Saturday, December 9, 2006 at 2:34pm by physics

susane
I have a question concerning waves. What effect does increasing the tension in a vibrating string have upon wavelength? I was thinking that as the weight increases more standing waves are created. As more standing waves are created, the wavelength decreases. I have one more ...
Saturday, February 3, 2007 at 7:29pm by Physics

micole
White light strikes a diffraction grating (930 lines/mm) at normal incidence. What is the longest wavelength that forms a second-order maximum? I used the equation [(1/d)sin(90)]/m = wavelength: [(1/0.93m)(1)] /2 = 0.5376m. To convert to nm I multiplied by 10^-9. This is ...
Sunday, August 19, 2007 at 8:00pm by PHYSICS

mojo
A hydrogen atom is in its elevnth excited state, n = 12. Using the Bohr model of hydrogen, find the linear momentum. You want to solve for the electron velocity and multiply that by the electrn mass. There are many ways to do this. One would be to get the radius of the orbit ...
Monday, August 20, 2007 at 11:41am by physics

natali
A 100W light bulb is left on for 10hrs. Over this period of time how much energy is used by the bulb? am i doing this right? my guess is to convert 100W to kW and convert 10 hrs to seconds and multiply the 2 together? which gives 3600J or should i just leave it in watts?
Monday, October 22, 2007 at 3:12am by Physics

Movies and physics
Hello...I need to find a modern day movie that has at least three or more physics mistakes. I need to prove they are mistakes...as well, is Zeno's Paradox a credited/valid source to use to prove something such as the everlasting gobstopper, from Willy Wonka, is physically ...
Wednesday, December 19, 2007 at 8:26pm by Physics!

french
Did you write this yourself? I am not sure if this makes sense or not...depui is not a word, it is depuis, and I am not sure that this sentence structure works either. What is this supposed to mean?
Wednesday, December 19, 2007 at 6:24pm by Physics!

A physics problem
Hello...I need to find a modern day movie that has at least three or more physics mistakes. I need to prove they are mistakes...as well, is Zeno's Paradox a credited/valid source to use to prove something such as the everlasting gobstopper, from Willy Wonka, is physically ...
Wednesday, December 19, 2007 at 9:38pm by Physics!

Jenish
A 1200 W hair dryer is designed for 117 v. a) What will be the percentage change in power output if the voltage drops to 105 v. b) How would the actual change in resistivity with temperature affect your answer.
Saturday, February 16, 2008 at 2:43am by Physics

Jenish
Suppose you want to run some apparatus that is 95 m from an electric outlet. Each of the wires connecting your apparatus to the 120 v source has a resistance per unit length of .0065 ohms/m. If your apparatus draws 3.0 A what will be the voltage drop across the connecting ...
Saturday, February 16, 2008 at 2:51am by Physics

physics.
1500W thingy heats1.5kg water from 18C to 59C in 3.0minutes. How mcuh n-ergy was used by the thingy?
Tuesday, February 19, 2008 at 2:54pm by physics.....

physics.
a 1500W thing heats 1.5kg of water from 18C- 59C in 3 minutes. how mcuh energy was used by the thing? how much energy was delivered to the waterr??
Thursday, February 21, 2008 at 12:51am by physics.....

Physics
hmmm aparently that's not how you do it hmmm could you please show me how to get the time step by step don't you have to use this equation X = 2^-1 a t^2 + Vo t + Xo write it in the second dimension Y = 2^-1 g t^2 + Vo t + Yo and sense there is no Yo I get this Y = 2^-1 g t^2...
Saturday, July 11, 2009 at 9:20pm by Physics

Physics
Ok I asked this question before A lbock is given an intial speed of 4.0 s^-1 m up the 22 degree plane How far up the plane will it go ok I got this to be something like 2.2 about i understand this i need help on this how much time elapses before it returns to tis starting ...
Saturday, July 11, 2009 at 9:20pm by Physics

Chels
What can you say about the motion of a body if its veloctiy-time graph is a straight line inclined with the time axis? a. the body moves with uniform velocity b.the body moves with uniform acceleration c. the body moves with non uniform acceleration d. the body moves with ...
Tuesday, April 29, 2008 at 1:33pm by Physics

tom
The sound emitted by bats has a wavelength of 3.0 mm. What is the sound's frequency in air? how do i do this??
Wednesday, April 30, 2008 at 4:23pm by physics

Phyiscs
A lbock is given an intial speed of 4.0 s^-1 m up the 22 degree plane How far up the plane will it go ok I got this to be something like 2.2 about i understand this i need help on this how much time elapses before it returns to tis starting point? Ignore friction. ok I need to...
Saturday, July 11, 2009 at 7:39pm by Physics

sara
In a constant-volume process, 211 J of energy is transferred by heat to 1.05 mol of an ideal monatomic gas initially at 303 K. (a) Find the increase in internal energy of the gas. J (b) Find the work done on it. J (c) Find its final temperature. K i am having trouble with this...
Tuesday, October 21, 2008 at 5:03pm by physics

sara
In a constant-volume process, 211 J of energy is transferred by heat to 1.05 mol of an ideal monatomic gas initially at 303 K. (a) Find the increase in internal energy of the gas. J (b) Find the work done on it. J (c) Find its final temperature. K i am having trouble with this...
Tuesday, October 21, 2008 at 5:14pm by physics

physics
I need help with solving these word problems. Marion rides her racing bicycle @ speed of 8 m/s. Bicycle wheels have a radius of 34 cm. What is the angular speed of wheels? How many times does each wheel go around during a 10-min race? A car tire has radius of 33cm. Tire turns ...
Monday, December 1, 2008 at 8:21pm by physics

Physics
I need help with solving these word problems. Marion rides her racing bicycle @ speed of 8 m/s. Bicycle wheels have a radius of 34 cm. What is the angular speed of wheels? How many times does each wheel go around during a 10-min race? A car tire has radius of 33cm. Tire turns...
Monday, December 1, 2008 at 8:59pm by physics

Physics
Is the answer for the 1st question ...23.5 rad/ sec? Is the answer for the 2nd question...66 times? Is the answer for the 3rd question...3382.5 meters?
Monday, December 1, 2008 at 8:59pm by physics

Physics
I need some help getting a formula. I remember in class u get this really wierd looking equation like Vicosg-((vsin(pheta))/2g) I think this is what the equatin is when I'm asked to "Derive a formula for the Range of a projectile based on Vi and the Launch angle, pheta. State ...
Monday, December 8, 2008 at 8:10pm by Physics

physics
I need some help getting a formula. I remember in class u get this really wierd looking equation like Vicosg-((vsin(pheta))/2g) I think this is what the equatin is when I'm asked to "Derive a formula for the Range of a projectile based on Vi and the Launch angle, pheta. State ...
Monday, December 8, 2008 at 10:42pm by Physics

Physics
A crate is pulled right with a force of 82.0N to the left wtih a force of 115N upward with a force of 565N and downward with a force of 236N Fine the net external force in the X direction Find the net external force in the y direction find the the magnitude and direction of ...
Sunday, December 14, 2008 at 4:16pm by Physics

physics
A craet is pulled right with a force of 82.0 N to the left with a force of 115N upward with a force of 565N and dow ward with a force of 236N Find the net external force in the x direction find the net external force in the y directin find the magnitude and direction of the ...
Sunday, December 14, 2008 at 5:08pm by Physics

physics
a ugst of wind blows an apple from a tree. AS teh apple falls the force of gravit on the apple is 9.25N downward and the force of the wind on the apple is 1.05N ot the right. Find the magnitude and direction fof the external force on the apple
Sunday, December 14, 2008 at 6:53pm by Physics

physics
how does tan give me direction?
Sunday, December 14, 2008 at 6:53pm by Physics

physics
What gives? projectile launched @ 10.0 m/s @ 45.0 degrees figured everyhting out go these three points I'm trying to apply my Algebra 2 class stuff to it to get the equation of the perabala (0,0) (5.1 , 20.4) (10.2 , 0 ) then i use matrix to find the values and my equation i ...
Monday, December 22, 2008 at 6:40pm by physics

physics
please my post from earlier
Monday, December 22, 2008 at 9:11pm by physics

physics
the other physics question
Monday, December 22, 2008 at 9:11pm by physics

physics
i have to build a catapult that will fire a projectile that will pass a 1m tall wall 1 m away from starting point and land in a target 1 m away from the wall. the catapult cant be more than 23cm high. I'm having some problems here with this for simpicity issues i said launch ...
Thursday, December 25, 2008 at 3:13pm by physics

physics
sigh this is killing me here... ok rockets launch at 250 m/s @ an angle of 75.0 degrees. There's a mountain 2500m away from launch point that is 1800m high. There's a boat 610 m from the island. So i'm suppose to find out how much it'll clear the moutain and close it'll come ...
Wednesday, January 14, 2009 at 10:23pm by physics

Physics
sigh this is killing me here... ok rockets launch at 250 m/s @ an angle of 75.0 degrees. There's a mountain 2500m away from launch point that is 1800m high. There's a boat 610 m from the island. So i'm suppose to find out how much it'll clear the moutain and close it'll come ...
Wednesday, January 14, 2009 at 10:51pm by physics

physics
please answer my question below
Thursday, January 15, 2009 at 5:24am by physics

Peter
A 200 N/m, 5 m spring on a 20 degree incline is compressed 2.3 m and a 5 kg block is placed on it. If we neglect friction, how far up the incline will the block travel? How fast will it be traveling when it is 0.2 m up the incline?
Thursday, January 15, 2009 at 1:31pm by Physics

Physics
A box slides down a 30.0 degree ramp with an acceleration of 1.20 m/s^2. Determine the coefficient of kinetic fiction between the box and ramp. I'm not exactly sure what to do here I know the formulas are uk = Fk/Fn Us = Fs, max/Fn not exactly sure how to do this problem with ...
Wednesday, January 28, 2009 at 10:23pm by physics

Physics
A 2.0 kg mass starts from rest and slides down an inclined plane 8.0 X 10^-1 m long in .50s. what net force is acting on the mass along the incline. I have no idea how to do this I don't know why they just didn't say .8m the back of the book says 13 N down the incline I can ...
Wednesday, January 28, 2009 at 10:30pm by physics

physics
A 5.0 kg bucket of water is raised form a well by a rope. If the upward acceleratiopn of the bucket is 3.0 m/s^2 find the force exerted by the rope on the bucket of water what exactly do i do here? 3.0 m/s^2 upward? is this the Fn? I have no idea how to do this problem...
Wednesday, January 28, 2009 at 10:40pm by physics

physics
odd i never seen this formula before and we haven't goten to tension yet thank you
Wednesday, January 28, 2009 at 10:40pm by physics

Physics
I don't see how I have enough information to answer this question If a car is traveling westward with a constant velocity of 20 m/s what is the net external velocity
Monday, February 2, 2009 at 5:57pm by Physics

Physics
well the net force is obivuosley greater than friction sense it's moving allowing it to move 20 m/s f=ma i don't know the mass so I don't know what to do here?
Monday, February 2, 2009 at 5:57pm by Physics

Physics
here's another one that i have no idea how to do If a car is accelerating downhill under a net force of 3674 N what force must the brakes exert to cuase the car to have a constant velocity?
Monday, February 2, 2009 at 5:57pm by Physics

Physics
An object thrown into the air stops at the highest pooint in its path is it in equilbrium at this point explain? I siad yes because it's moving for that one breif moment I wasn't sure or not so I'm asking to see if this is right
Monday, February 2, 2009 at 6:07pm by Physics

Physics
Yah i got another question a large crate is placed on the bed of a truck but is not tied down as the truck accelerates forward the crate slides across the bed until it hits the tailgate explain what causes this i'm completley lost
Monday, February 2, 2009 at 6:13pm by Physics

Physics
A box slides down a 30.0 degree ramp with an acceleration of 1.20 m/s^s Determine the coefficent of kinetic friction between the box and the ramp How on earth do I do this with only this amount of information???
Tuesday, February 3, 2009 at 8:44pm by Physics

Brock
An object creates an inverted, virtual image, 3 cm tall, 10 cm from a converging mirror with a focal length of 15 cm. Where is the object located? How tall is it? I didn't think mirrors created inverted virtual images...
Tuesday, February 24, 2009 at 10:04pm by Physics

KC
When a plane experiences a decrease in weight must there also be decrease in lift? I'm thinking the answer is yes in order to maintain equilibrium.
Wednesday, March 11, 2009 at 3:22pm by Physics

KC
Great! thanks a lot.
Wednesday, March 11, 2009 at 3:22pm by Physics

physics
A certain radio wave has a frequency of 2.0 * 10^6 Hz. what is its wavelength?
Wednesday, March 11, 2009 at 6:30pm by physics

physics
here is my question: A bullet with a mass of 6.00 g is fired through a 1.25 kg block of wood on a frictionless surface. The initial speed of the bullet is 896 m/s, and the speed of the bullet after it exits the block is 435 m/s. At what speed does the block move after the ...
Wednesday, March 11, 2009 at 6:38pm by physics

physics
find the final equilibirum temperature when 10.0 g of milk at 10.0degC is added to 1.60*10^2 g of coffee with a temperatrure of 90.0degC. Assume the specific heats of coffee and milk are the same as for water (Cp,w=4.19J/g*degC) and disregard the heat capacity of the container...
Wednesday, March 11, 2009 at 6:41pm by physics

history
so its A
Wednesday, March 11, 2009 at 6:24pm by physics

physics
so Tf is 84.70?
Wednesday, March 11, 2009 at 6:41pm by physics

physics
can you please show me?
Wednesday, March 11, 2009 at 6:38pm by physics

physics
here is my problem: a concave mirror forms a real image at 17.0 cm from the mirror surface along the principal axis. if the corresponding object is at a distance of 36.0 cm, what is the mirror's focal length? here's my work: 1/f = 1/v + 1/u where f=focal length=? u= -36 cm (...
Wednesday, March 11, 2009 at 9:44pm by physics

physics
here is my problem: a concave mirror forms a real image at 17.0 cm from the mirror surface along the principal axis. if the corresponding object is at a distance of 36.0 cm, what is the mirror's focal length? here's my work: 1/f = 1/v + 1/u where f=focal length=? u= -36 cm (...
Wednesday, March 11, 2009 at 9:50pm by physics

physics
please check these: a laser can be used a. to treat glaucoma b. to measure distance c. to read bar codes d. all of the above D in a laser, all of the following forms of energy can be converted into coherent light except a. chemical energy b. electrical energy c. light d. ...
Wednesday, March 11, 2009 at 9:57pm by physics

physics
here is my problem: a concave mirror forms a real image at 17.0 cm from the mirror surface along the principal axis. if the corresponding object is at a distance of 36.0 cm, what is the mirror's focal length? here's my work: 1/f = 1/v + 1/u where f=focal length=? u= -36 cm (...
Thursday, March 12, 2009 at 11:04am by physics

physics
please help: A repelling force occurs between two charged objects when the charges are of a. unlike signs b. like signs c. equal magnitude d. unequal magnitude
Thursday, March 12, 2009 at 11:09am by physics

physics
how would i go about solving this problem? what formula shoud i use? can you please show me in steps how to do this, thanks a lot: The critical angle of refraction for calcite is 68.4degrees when it forms a boundary with water. Use this information to determine the speed of ...
Thursday, March 12, 2009 at 4:50pm by physics

physics
pleaase help me with this, i'm very bad in physics, and i mostly don't understand any of this stuff...can anyone explain as well as show me how to do this Monochromatic light from a helium-neon laser (wavelength=632.8 nm) shines at a right angle onto the surface of a ...
Thursday, March 12, 2009 at 4:59pm by physics

History
the confederates also thought that if they had a choice to be a united nation, they also had a choice to leave it.
Thursday, March 12, 2009 at 4:43pm by physics

MATH
11/5 is an improper fraction, once you divide it, it will become a mixed number like MS.Sue said, 2 1/5
Thursday, March 12, 2009 at 4:25pm by physics

physics
please check these for me: What is the wavelength of microwaves of 3.0*10^9 Hz frequency? a. 0.050m b. 0.060m c. 0.10 m d. 0.20 m C If a light ray strikes a flat mirror at an angle of 30deg from the normal, the ray will be reflected at an angle of a. 30deg from the mirror's ...
Thursday, March 12, 2009 at 6:54pm by physics

physics
please check these for me: If atmospheric refraction did not occur, how would the apparent time of sunrise and sunset be changed? a. both would be later b. both would be earlier c. sunrise would be later, and sunset would be earlier d. sunrise would be earlier, and sunset ...
Thursday, March 12, 2009 at 7:02pm by physics

French Cuisine (Check)
wow, it sounds really good but i think there might be a few spelling or grammatical errors, i found one:like 'seamed' which should be 'seemed'
Thursday, March 12, 2009 at 6:59pm by physics

physics
please check these for me: When a positive charge moves in the direction of the electric field, what happens to the electrical potential energy associated with the charge? a. it increases b. it decreases c. it remains the same d. it sharply increases, and then decreases C A ...
Thursday, March 12, 2009 at 7:09pm by physics

Physics
what would be the appropriate answer choice for this question: If the batteries in a portable CD player provide a terminal voltage of 12 V, what is the potential difference across the entire CD player? a. 3.0 V b. 4.0 V c. 6.0 V d. 12 V thanks alot guys
Thursday, March 12, 2009 at 7:30pm by physics

physics
If atmospheric refraction did not occur, how would the apparent time of sunrise and sunset be changed? a. both would be later b. both would be earlier c. sunrise would be later, and sunset would be earlier d. sunrise would be earlier, and sunset would be later C drwls told me ...
Thursday, March 12, 2009 at 10:08pm by physics

physics
i can not find the correct answer for this one i got D but someone siad its wrogn electric field strength depends on a. charge adn distnace b. charge adn mass c. Coulomb constant and mass d. elementary charge adn radius
Thursday, March 12, 2009 at 10:13pm by physics

physics
nevermind i think its A can you check that?
Thursday, March 12, 2009 at 10:13pm by physics

physics
ok, :)
Thursday, March 12, 2009 at 10:13pm by physics

physics
i'm still getting C as the answer to this one drwl said its wrong When a positive charge moves in teh direction of the electrical field, what happens to the electrical potential energy associated with the charge? a. increase b. decreases c. remains the same d. increases ...
Thursday, March 12, 2009 at 10:23pm by physics

physics
please check these 3: if the batteries in a portable CD player provide a terminal voltage of 12 V, what is the potential difference across the entire CD player? a. 3.0 V b. 4.0 V c. 6.0 V d. 12 V D two resistors having the same resistance value are wired in parallel. how does ...
Thursday, March 12, 2009 at 10:31pm by physics

physics
drwls said this is wrong but i don't know what's correct the enregy gained by electrons as they are accelerated by an electric field is a. greater than the average loss in energy due to collissions b. equal to the avergae loss in energy due to collissions c. less than the ...
Thursday, March 12, 2009 at 10:34pm by physics

physics
thanks!
Thursday, March 12, 2009 at 10:31pm by physics

physics
check which of the following modifications to a solenoid would be most likely to decrease the strength of its magnetic field? a. removing its iron rod core adn increasing teh number of coils b. increasing the current and reducing the number of coils c. reducing teh number of ...
Thursday, March 12, 2009 at 10:45pm by physics

physics
then it's A?
Thursday, March 12, 2009 at 10:34pm by physics

physics
according to Lenz's law, the magnetic field of an induced current in a conductor will a. enhance the applied field b. heat the conductor c. increase the potential difference d. oppose a change in the applied magnetic field i think D
Thursday, March 12, 2009 at 10:47pm by physics

KC
Is anyone aware of some good links to sites which discuss and explain G-Force? I've searched but haven't come up with anything very worthwhile.Something with practice problems would be great. Thanks!
Friday, March 13, 2009 at 4:00pm by Physics

KC
I have an assignment to discuss what scientists are doing to reduce the g forces on astronauts and to come up with a g force problem of my own. Can you help?
Friday, March 13, 2009 at 4:00pm by Physics

physics
please check these: A concave mirror with a focal length of 10.0 cm creates a real image 30.0 cm away on its principal axis. How far from the mirror is the corresponding object? a. 20cm b. 15cm c. 7.5cm d. 5.0cm B A diffraction grating that contains 650 472 lines/m is ...
Friday, March 13, 2009 at 5:46pm by physics

physics
please check this one question: Which interaction of nature binds atoms and molecules by attracting unlike charges and repulsing like charges? a. strong b. weak c. electromagnetic d. gravitational A
Friday, March 13, 2009 at 5:50pm by physics

physics
If you stand 3.0 m in front of a flat mirror, how far away from you would yourimage be in the mirror? 6.0 m If light waves are coherent, a. they shift over time b. their intensity is less than that of incoherent light c. they remain in phase d. they have less than three ...
Friday, March 13, 2009 at 7:25pm by physics

physics
A concave mirror forms a real image at 17.0 cm from the mirror surface along the principal axis. If the corresponding object is at ta distance of 36.0 cm, what isi teh mirror's focal length? let u be the object distance let v be the image distance v=17 cm u=36 cm 1/f = 1/u + 1...
Friday, March 13, 2009 at 7:42pm by physics

physics
is this done correctly? A step-down transformer has 16000 turns on the primary adn 95 turns on the secondary. If the rms emf across the secondary coil is 120 V, what is the maximum emf across the primary coil? Np=16000 Ns=95 turns Vs=120V Vp=? Ns Vs ___ = ____ Np Vp Ns*Vp=Vs*...
Friday, March 13, 2009 at 7:55pm by physics

physics
please check these: Which interaction of nature binds atoms and molecules by attracting unlike charges and repulsing like charges? a. strong b. weak c. electromagnetic d. gravitational i got A, but someone said C , so i just want to make sure How is a motor's mechanical energy...
Saturday, March 14, 2009 at 10:57am by physics

physics
there is a figure that looks kind of like this: E6--------------------- E= -0.378eV E5--------------------- E= -0.544eV E4--------------------- E= -0.850eV E3--------------------- E= -1.51eV E2--------------------- E= -3.40eV the figure shown above shows the enrgy levels for a...
Saturday, March 14, 2009 at 11:01am by physics

physics
so, how would i write it out? = -0.544 - -3.40 ????????
Saturday, March 14, 2009 at 11:01am by physics

physics
An elevator weighing 2.00*10^5 N is supported by a steel cable. What is the tension in the cable when the elevator is accelerated upward at a rate of 3.00 m/s^2? (g=9.81 m/s^2) weight = mg = 2*10^5N = m(9.8) = 2*10^5N mass = m = 2*10^5kg _________ 9.8 = 2.04*10^4kg T-mg=ma T=m...
Saturday, March 14, 2009 at 11:16am by physics

physics
ok, thanks...i just want few other people to reply to this post...just to be sure i agree with you but int the one "which of the following statements about electromagenetic..." i'm not sure between B and D thanks again
Saturday, March 14, 2009 at 10:57am by physics

physics
can you check this : a repelling force occurs between two charged objects when teh charges are of a. unlike signs b. like signs c. equal magnitude d. unequal magnitude i chose B
Saturday, March 14, 2009 at 12:51pm by physics

physics
The critical angle of refraction for calcite is 68.4 degrees when it forms aboundary with water. Use this information to determine teh speed of light in calcite. refaraction index 'n' n=cosec 68.4degrees n=1.07 is this done correctly?
Saturday, March 14, 2009 at 12:52pm by physics

physics
Monochromatic light from a helium-neon laser (wavelength=632.8 nm) shines at a right angle onto the surface of a diffraction grating that contains 130 960 lines/m. Find the angle at which one would observe the first-order maximum. formula: (a+b)Sin theta = n wavelength (a+b...
Saturday, March 14, 2009 at 12:56pm by physics

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