# Search results for query: *

thanks alot.
2. ### 2 more thermal expansion questions

"Hint: How does the period of a pendulum depend on its length?" taht the thing i don't no...so i can't do the Q...
3. ### 2 more thermal expansion questions

for number one, are u suggesting taht i should use the linear equation instead of the volume one? linear equation being delta L=alpha(Lo)(delta T)
4. ### 2 more thermal expansion questions

1.) a steel rod is 3 cm in diameter at 25 C. a brass ring has an interior diameter of 2.992 cm at 25 C. at what common temperture will the ring just slide into the rod? for this Q, i am not too sure which equation to use. i think it's the volume change one, which is delta V= beta(Vo)(delta T)...
5. ### Coefficient of linear thermal expansion of a composite bar

ahhh...that clearified me...i think i get it...thanks alot.
6. ### Coefficient of linear thermal expansion of a composite bar

question: a composite bar of length L=L1+L2 is made from a bar of material 1 and length L1 attached to a bar of material 2 and length L2. show that the effective coefficient of linear thermal expansion is : alpha= (a1L1+a2L2)/L [- alpha/a=coefficient of linear thermal expansion] i...
7. ### Cathode ray tube(CRT) question

thanks a lot seiferseph. how u figure the equation D=Vd/Va?...whats the physics behind it? or it's simply using the rule of ratio?
8. ### Cathode ray tube(CRT) question

can anyone please give some idea......i am sure there are a lot of people who can help me...it's not that hard is it?
9. ### Cathode ray tube(CRT) question

hold on...why the electron moves twice as fast, shouldn't it be squarroot(2) times as fast? equation used: 1/2mv^2=Vq=KE if V is doubled, and m and q is constant, then v should be squarroot(2) times as fast, isn't it?
10. ### Cathode ray tube(CRT) question

no one has any idea?
11. ### Downward, find airtime, velocity

dude, try to understand the physics before pluging in numbers into a meaningless equation...read the book first...
12. ### Electrochemical Cell Question.

mozart you are right, the ones which have the highest reduction potential will get reduced, and the one that have the highest oxidation potential (or lowest reduction potential) will get oxidized. you should have a chart full of all the redox reactions to do this question. and i think your...
13. ### Cathode ray tube(CRT) question

in a CRT, the deflection on the screen is 2.4 cm when the accelerating voltage is 480 V and the deflecting voltage is 36 V. what deflection on the screen will you see if the accelerating voltage is 960 V (doubled) and the deflecting voltage is 18 V (halfed)? answer is 0.6 cm can anyone...
14. ### Uniform circular motion - centripetal force and banked curves

i once asked a question very similar to this (and it's solved). look at the posts i made to find that problem. it might help a bit...
15. ### Permutation question (math) [ ]

oh...i think i got it...thanks for this "If a vertex only has one other vertex leading into it--say the other vertex has 7 ways to get to it--then how many ways can you get to that second vertex?" again..thanks alot!
16. ### Permutation question (math) [ ]

why u have a 10 after the 10? how the get the second 10?
17. ### Permutation question (math) [ ]

but how u going to get the numbers for the dots in the park! i did try to solvei t using pascal triangle thing...but i got stuck on the park thing...

19. ### Permutation question (math) [ ]

permutation question (math) [urgent] image here please solve this problem for me. the correct answer is c. i put 10!/(4!6!), then i know i am suppose to divide/subtract something, but i don't know what. (i have never done this kind of problem before.)
20. ### Check Eqn of Circle with diameter end points(1,2) and (3,-6)

so is my equation wrong data? because i can't find out where i got wrong.
21. ### Check Eqn of Circle with diameter end points(1,2) and (3,-6)

i think my graphic calc is wrong (since i rememebr my teacher told me that he might accidently changed my program). just copy my equation.
22. ### Check Eqn of Circle with diameter end points(1,2) and (3,-6)

think about this, the diameter given is sloped, thus the centre of the diameter wouldnot have the same x value as one of its end points...
23. ### Check Eqn of Circle with diameter end points(1,2) and (3,-6)

why you think the radius is (1,-4) i think its (2,-2)
24. ### Check Eqn of Circle with diameter end points(1,2) and (3,-6)

nope, it's even more wrong then mine
25. ### Check Eqn of Circle with diameter end points(1,2) and (3,-6)

"(x-2)^2+(y+2)^2=17 is this one right?" i think so. but my graphic calc says i am wrong
26. ### Check Eqn of Circle with diameter end points(1,2) and (3,-6)

acutally, i really think your radius is wrong, sqrt 68 then divide by 2 is 4.1231. i also think that the transformation part is right , but it turns out to be wrong in my calculator
27. ### Check Eqn of Circle with diameter end points(1,2) and (3,-6)

lol...i graphed both equations (mine and yours) in my graphic calculator...both are wrong...
28. ### Check Eqn of Circle with diameter end points(1,2) and (3,-6)

no... (x-1)^2+ (y+4) ^2= 34
29. ### Check Eqn of Circle with diameter end points(1,2) and (3,-6)

if the equation is x^2+y^2=34 , then the centre is (0,0). but according to your diameter, the centre should not be (0,0). btw, the radius is 4.1231... i think the equation is (x-2)^2+(y+2)^2=17
30. ### Another circuit diagram simplifying question (harder)

oh...i get it. thanks a lot Ouabache for your last implication. thanks very much everyone.
31. ### Another circuit diagram simplifying question (harder)

i got to the point where you got. but then i don't know how to find the net resistance when the battery is in the middle...
32. ### Another circuit diagram simplifying question (harder)

hm...well can you please tell what you might do FIRST in order to find the net resistance?
33. ### Another circuit diagram simplifying question (harder)

i think the diagram can be simplify into this...but can you please show me what to do next?
34. ### Another circuit diagram simplifying question (harder)

can you please show me how to do it?
35. ### Another circuit diagram simplifying question (harder)

i think i did it the way you told me to, but then i got the wrong answer. my answer is 43.3333, but the right answer is 50...
36. ### Another circuit diagram simplifying question (harder)

i have thought of that : using kirchhoffs rules to find the net resistance. but i have no idea how the rules relates to resistance.
37. ### Another circuit diagram simplifying question (harder)

here's the problem i want to find the net resistance. the only problem i think i have is that i don't know how to change the diagram so that the battery isn't in the middle of the circuit (i only know how to do questions where the battery is connected like a single complete path, which this...
38. ### Simplifying circuit diagrams

whew, holycow, THANKS A LOT MAN. i finally get it, turns out i am missing some thing i "think" i would of thought about... again, thanks very much for your time and your elaborate drawings.
39. ### Simplifying circuit diagrams

lol...the exact answer in the book is 3.575... and i still can't get the answer...don't know what i am missing...
40. ### Simplifying circuit diagrams

actually, the answer is 3.6 ohms...
41. ### Simplifying circuit diagrams

k, thanks a lot whozum.
42. ### Simplifying circuit diagrams

why you can't combine the ones in the green circle?
43. ### Simplifying circuit diagrams

if the answer is 1/.733...then it's right...
44. ### Simplifying circuit diagrams

well, that isn't really my problem, but if you want to know, R=2.2 (for every one). i am trying to find the net resistance.
45. ### Simplifying circuit diagrams

here's the pic
46. ### Simplifying circuit diagrams

oh...(it's my first time posting pics)
47. ### Simplifying circuit diagrams

why can't you see it? i can see it no problem...hmmm... i know those equations...anways..you' ll have to see my diagram to see what i am asking.
48. ### Simplifying circuit diagrams

i want to transform the black diagram into a series and parellel circuit (as u a see that the black diagram isn't exactly series or parellel). i made the two top left resistors into one (blue circle), and i want to do the same thing for the other two in green circle. however, if i make the top...
49. ### Is current used up in a resistor or the voltage is used up?

thanks, xanthym. i was doing the problems and i found, just like you said, the voltage "drops", and the value is equal to V=IR
50. ### Is current used up in a resistor or the voltage is used up?

chroot, thanks a lot.