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#26 Help Me ! » diff eqs » 2008-06-10 05:31:54
- missbossyy
- Replies: 0
Use the power series method to solve the given diff. eqs subject to the indicATED INITIALS CONDITIONS.
y"-2xy' + 8y = 0 , y(0)=3, y' (0) = 0
please give all details and explanation of each step
#27 Help Me ! » first four series. » 2008-06-10 03:49:32
- missbossyy
- Replies: 0
Find the first four series.
1.) sinx cosx
2.) tan x
plz give details
#28 Help Me ! » power series » 2008-06-10 03:48:08
- missbossyy
- Replies: 0
Find the interval of convergence of the given power series.
∞
1.) Σ k!2kxk
k=0
∞
2.) Σ (x-3)n/ n3
n=1
please give all the details....
#29 Help Me ! » Find the diffe. operator that annihilates the given function » 2008-05-27 05:44:31
- missbossyy
- Replies: 0
1. cos2x
2. 1+6x-2x^3
#30 Re: Help Me ! » linear ind » 2008-05-27 03:33:00
can u explain me by using Wronskian......?
#31 Help Me ! » Differential eqs » 2008-05-27 02:52:28
- missbossyy
- Replies: 1
Observe that for the functions f1(x) =2 and f2 (x) = ex ,
1. f1(0) - 2. f2(0) = 0
Does this imply that f1 and f2 are linearly dependent on any interval containing x=0?
#32 Help Me ! » linear ind » 2008-05-27 02:51:47
- missbossyy
- Replies: 3
Compute with Wronskian, to see it is linearly independent on given inteval
Sinx, csc x; (0,pi)
#33 Re: Help Me ! » binary » 2008-05-19 04:20:26
thanks!
#34 Re: Help Me ! » Story type problem in diff. equations » 2008-05-19 04:19:55
thanks!
#35 Help Me ! » Story type problem in diff. equations » 2008-05-14 05:02:28
- missbossyy
- Replies: 2
Under some circumstances a falling body B of mass m, such as the skydiver, encounters air resistance proportional to its instantaneous velocity v. Use Newton's second law to find the differential equation for the velocity v of the body at time t. Recall that acceleration is a = dv/dt. Assume in this case that the positive direction is downward.
EXPLAIN THE WAY THAT IT WILL BE HELPFUL FOR MY PREPARATION OF THE TEST....
#36 Re: Help Me ! » Differentail Equations » 2008-05-14 04:55:17
yeay! i was on right track....
thank you so much....u r help and time is much appreciated :-)
#37 Re: Help Me ! » linear or non-linear » 2008-05-14 04:46:43
1. non-linear, 2nd order
2. non-linear 4th order
3. non-linear, 3rd order
I am not sure if its right.........I am preparing myself for a test so please tell me where am i wrong...
I will appreciate your help...
#38 Help Me ! » Differentail Equations » 2008-05-14 04:40:24
- missbossyy
- Replies: 2
Verify functions are solution of given differential equations.
1. dy/dx -2y = e^3x; y=e^(3x) + 10 e^(2x)
2. y' + y = sin x; y= 1/2 sin x - 1/2 cosx + 10 e^(-x)
3.[(y')^3 + x y' =y; y=x+1
#39 Help Me ! » linear or non-linear » 2008-05-14 04:26:55
- missbossyy
- Replies: 2
1.
2.
3.
#40 Help Me ! » binary » 2008-05-05 15:57:04
- missbossyy
- Replies: 2
Convert the following Base 10 (decimal) numbers to base 2 (binary):
173
296
999
107
200
B. Convert the following Base 2 (binary) numbers to base 10 (decimal):
110011
1001111
11111111
11101
1010101
C. Add the following Base 2 (binary) numbers, submit the binary answer:
110001 + 111
1111 + 100
1001 + 101
101 + 101
100 + 1100
D. Subtract the following Base 2 (binary) numbers, submit the binary answer:
1001 - 101
10111 - 101
11011 - 100
1100 - 101
1000 - 1
#41 Re: Help Me ! » help » 2008-02-11 03:54:49
thank u so much for the time it took u to help me, i appreciate it!
#42 Re: Help Me ! » Newton's Second Law » 2008-02-10 17:28:35
please help! its due tomm.......
#43 Re: Help Me ! » Phys~~ » 2008-02-10 04:33:18
thank u so so so much
#44 Re: Help Me ! » Help! Phys » 2008-02-10 04:32:55
thank u so so so much
#45 Help Me ! » Phys~~ » 2008-02-09 04:27:24
- missbossyy
- Replies: 2
A wind farm generator uses a two-bladed propeller mounted on a pylon at a height of 20
meters. The length of each propeller blade is 12 m. A tip of the propeller breaks off when
the propeller is vertical. At that instant, the period of rotation of the propeller is 1.2 sec.
The fragment flies off horizontally and strikes the ground at point P.
(A) Calculate the initial speed v0 of the tip as it is launched from the propeller.
(B) Calculate the horizontal distance from the base to point P.
(C) Calculate the angle from the vertical at which the tip strikes point P.
#46 Help Me ! » Help! Phys » 2008-02-09 04:26:21
- missbossyy
- Replies: 2
Two blocks connected by a string are held at rest along an incline plane by a second
string tied to a wall (see the diagram). The mass of the lower block is 1.0 kg; the mass of
the upper block is 2.0 kg. The incline makes an angle of 37° to the horizontal. Calculate
(A) the tension in the string connecting the two blocks.
(B) the tension in the string between the 2.0-kg block and the wall.
#47 Re: Help Me ! » confused » 2008-02-09 04:19:12
THANKS FOR THE TIME IT TOOK YOU TO HELP ME :-) i APPERICATE IT !
#48 Re: Help Me ! » Physics » 2008-02-09 04:10:27
I think the answer is (C)...is it right?...
This is a practice test question which I am solving for my test perpration and I don't have answers to it, so I just want to make sure......
THANKS FOR THE TIME IT TOOK YOU TO HELP ME :-) i APPERICATE IT !
#49 Help Me ! » confused » 2008-02-08 18:54:11
- missbossyy
- Replies: 2
Trains A and B face each other on adjacent parallel tracks. They are initially 400 meters
apart and at rest. Train A accelerates at 1.4 m/s2 to the right and train B accelerates at 2.2
m/s2 to the left.
(A) Calculate the time it takes the trains to pass each other.
(B) Calculate how far train A has traveled during this time interval.
#50 Help Me ! » help » 2008-02-08 18:53:11
- missbossyy
- Replies: 2
An object moves according to the equation v(t) = 1 + 3 t2 with v in m/s and t >_0 in seconds. The displacement of the object in the interval t = 0 to 2 seconds equals
(A) 10 m
(B) 11 m
(C) 12m
(d) 13 m
(E) 14 m
Please don't guess!