# Search results for query: *

1. ### Archived Binding energy and deuterium nucleus

Homework Statement a) Calculate the average binding energy per nucleon in the deuterium nucleus. b) The energy that binds an orbiting electron to the hydrogen nucleus is 13.4eV. Calculate the ratio of the binding energy per nucleon to the binding energy per electron in deuterium. Which...
2. ### Electronic configurations and periodicty

An element with the following electronic configuration: [Ar]3d3 4s2 a) what. Does it belong to? Period 4 b) what is its group number? Group 5 c) what kind of element is it? Transition metal d) how many of how electrons are there in an atom of this element? 3 2. what atom has this...
3. ### An Ore contains 19.6 %

oh ok.. so i multiply my sb by 2 and s by 3 .. (their masses and then add them together like normally)
4. ### An Ore contains 19.6 %

An Ore contains 19.6 %... Question: An ore contains 19.6% of the mineral stibnite, Sb2S3, which is a source of the element Sb. how much ore must be processed in order to obtain 47.0kg of Sb? My Work: (47000g Sb)((153.825g Sb2S3/ 2 (121.76 g Sb)) (100g ore/19.6g Sb2S3) which equals...
5. ### Rounding Sig Figs: 6.941+63.996+35.45 = 106.387

so you always use the smallest one correct?
6. ### Rounding Sig Figs: 6.941+63.996+35.45 = 106.387

ok so this may sound really dumb but i need to refresh my memory on this so here is the question 6.941+63.996+35.45 = 106.387 how do i know how many sig figs to round too with this?
7. ### Light wavelength passing through a grating sketch help

Homework Statement light with a wavelength of 520 nm abd 630 nm passes through a diffraction grating that contains 6000 lines/cm. a) sketch a diagram of the image produced from m=0 to m=2, label the order of each fringe b) calculate the angles for the first and second order maxima that...
8. ### Single slits involving one source of monochromatic light

1. Homework Statement Two different single slits are used in an experiment involving one source of monochromatic light. With slit 1 in place, the first dark fringe is observed at an angle of 45 degrees. With slit 2, the first dark fringe is observed at an angle of 55 degrees. a)Which slit is...
9. ### Neon laser grade 12 physics

A single slit is illuminated with a helium-neon laser whose wavelength is 633 nm. If the slit width is 2.2 x 10 e-5 m, calculate the position of the third maximum in degrees 2. Homework Equations Sin Theta(m) = (m + 0.5) Lambda/w 3. The Attempt at a Solution Sin Theta(3) = (3 +...
10. ### Potential difference that needs to be mantained

Calculate the potential difference that would have to be maintained across the plates of a parallel plate apparatus, if the plates were 1.2cm spat, to create an elecric field strength of 1.5x10^4 N/C. i have no idea how to do this! someone please help
11. ### Electric, Gravitatinal, and magnetic

Electric, Gravitatinal, and magnetic! which two of the three types of field discussed in this lesson were most similar> provide supporting evidence. there are electric, gravitational and magnetic.. im guessing its electric and magnetic.. but I am not sure!
12. ### Electric bell description help

could you help me with this! which two of the three types of field discussed in this lesson were most similar> provide supporting evidence. there are electric, gravitational and magnetic.. im guessing its electric and magnetic

thanks!
14. ### Acceleration with Fe2+ ion and Fe3+ ion help

Acceleration with Fe2+ ion and Fe3+ ion help! A sample of two different iron ions, Fe^2+ and Fe^3+, are accelerated by the same potential and sent through the uniform magnetic field of a mass spectrometer. a)Which ions moves faster after being accelerated. Justify with relevant equations...
15. ### Electric bell description help

describe how an electric bell operates (HINT: the make break contact dose not move; the hammer, however, moves bath and forth very quickly as it rings the bell) my solution An electric bell is a mechanical bell that functions by means of an electromagnet. When an electric current is...
16. ### Data of several moons of the planets Uranus (new)

Copy the table and determine keepers third law constant ku for Uranus using the data for the first floor moons sorry for the mirror effect its the only way i could get the page so you could read it .. its on the right # 32 b) find the average of the Ku, values of your calculations...
17. ### Gravitational pull with the earth and moon

Thank you very much and sorry for my horrible computer skills! I'll try that next time !
18. ### Gravitational pull with the earth and moon

Homework Statement The mass of the moon is 7.35x10^22 kg. At some point between Earth and the Moon, the force of Earth's gravitational attraction on an object is canceled by the Moon's force of gravitational attraction. If the distance between the Earth and the moon (center to center) is...
19. ### Kinematics- police driver acceleration problem

or should i have stuck with 80km... and i would of got -21.3 km/h (i think that's the units not ti sure)
20. ### Kinematics- police driver acceleration problem

ok so 80km/h is 22m/s so.. 0=22^2+2a(150) 0= 484+a300 -484=a300 -484 ------ = a 300 -1.61 = a is it still in m/s?
21. ### Kinematics- police driver acceleration problem

because it is slowing down that's why it is negative
22. ### Kinematics- police driver acceleration problem

ok so its just 0... so i just sub everything into the equaiton?
23. ### Kinematics- police driver acceleration problem

ok so my s is 150m and my initial veloticy is 80km but i need to put that into m/s.. how do i find the final velocity?
24. ### Kinematcis, archer and his arrow

An archer shoots an arrow straight up into the air with an initial velocity of 45 m/s [U]. Calculate the maximum height of the arrow. The equation I would use for this is: Vf^2 = Vo^2+2as where: Vf is final velocity Vo is initial velocity a is acceleration (gravity) s is displacement plug in...
25. ### Kinematics- police driver acceleration problem

In an accident investigation police measured the skidmarks left my vehicle. they measure the skidmarks to be 150 m from the point where the driver applied the brakes to where the car came to rest. In their investigation the police Sumat the driver was traveling at this bead limit of 80 km/h...
26. ### The mass of the pendulum bob was determined on an electronic scale and

Bottom of swing?
27. ### The mass of the pendulum bob was determined on an electronic scale and

How did you get that. I know it's Energy output ------------------ x100 Energy input
28. ### The mass of the pendulum bob was determined on an electronic scale and

How did you get that ?!?
29. ### The mass of the pendulum bob was determined on an electronic scale and

Ok just scratch all of that. New question. How do I find the efficiency ?
30. ### The mass of the pendulum bob was determined on an electronic scale and

So I can find its final height
31. ### The mass of the pendulum bob was determined on an electronic scale and

I need the speed that it is falling at though
32. ### The mass of the pendulum bob was determined on an electronic scale and

Yes so my initial speed v is 0m/s as when it starts at intial hieght at 0.48m it is not moving. I need to find out the speed when it moves to the other side and need that hieght I determine if it obeys the law or not.
33. ### The mass of the pendulum bob was determined on an electronic scale and

Of the pendulum when it hits its final hieght ...
34. ### The mass of the pendulum bob was determined on an electronic scale and

Ok v is speed sorry
35. ### The mass of the pendulum bob was determined on an electronic scale and

So v is 0 for the first hieght. The starting hieght at 0.48m r 48cm .. Because it is not moving. I need to know what v is for the final so I can determine te hieght. So how do I find v when I have calculate the J for E mechancal. As posted above in previouse post
36. ### The mass of the pendulum bob was determined on an electronic scale and

And you are saying I need v.. So how to I get that? What equation do I use?
37. ### The mass of the pendulum bob was determined on an electronic scale and

That's what I used above ?? I don't understand why they gave me so much info
38. ### Direction of electric current in a conductor

As you probably can see I can not really grasp the concept. Could you please explain the change in magnetic flux and what is happening .. Is it because he force of the conductor is acting upon it causing It to change ?? Or could you reword what I mean into the proper way?
39. ### The mass of the pendulum bob was determined on an electronic scale and

Then for final height I did 0+ mgdeltah= 1.6J (0.3403)(9.8m/s^2)deltah=1.6J So delta h = 0.48 therefore it obeys the law?
40. ### The mass of the pendulum bob was determined on an electronic scale and

So if I use this equation 1/2mv^2+mgdeltah It look like this. 0+0.3403 x 9.8m/s^2 x 0.48m? Which equals 1.6 j as its initial spot at a...
41. ### The mass of the pendulum bob was determined on an electronic scale and

I know I use diameter and the 11.8 ms but I don't know the equation
42. ### Direction of electric current in a conductor

I am getting so confussed here ... I have no Idea what you are talking about .. :(
43. ### The mass of the pendulum bob was determined on an electronic scale and

How do I calculate for v?
44. ### The mass of the pendulum bob was determined on an electronic scale and

Oh and I converted grams to kg and cm to m
45. ### The mass of the pendulum bob was determined on an electronic scale and

The mass of the pendulum bob was determined on an electronic scale and its diamter was measured using calipers. The initial height was measured with a meter stick. At the lowest point of its swing, the pendulum bob broke a photogate light beam. The time interval that the light was interrupted...
46. ### Direction of electric current in a conductor

Ok lenzes law states An induced electromotive force (emf) always gives rise to a current whose magnetic field opposes the original change in magnetic flux. So it was going up and out of page?0
47. ### Direction of electric current in a conductor

Sorry I'm a little lost
48. ### Direction of electric current in a conductor

So where is my current .. I'm kind of lost now :s
49. ### Direction of electric current in a conductor

Ok so I leave my diagram the way it is .. But the current dose not flow to the right correct ?
50. ### Direction of electric current in a conductor

So this question number 45.. Can not be Anwsered is what you are saying and a drawing can not be drawn for it?