Stuck Definition and 836 Threads

Hi, I've been stuck on trying to figure out what I am not seeing in the problem as i just can't seem to get the answer. A particle moving in simple harmonic motion with a period T = 1.5s passes through the equilibrium point at time t initial = 0 with a velocity of 1.0m/s to the right. At...

Stuck on this problem! Help please? Could some please help me with this question, really stuck on it! thanks! :wink:

\int_a^b f(x)dx = a+2b \int_a^b (f(x)+5)dx =? \int_a^b (f(x)+5)dx =\int_a^b f(x)dx+\int_a^b 5dx a+2b+\int_a^b 5dx I'm stuck, what should be my next step?

I had a two-part question but I've figured out the first part. A cannon with mass of 1960 kg fires a 24.5 kg ball horizontally. The cannonball has a speed of 120 m/s after it has left the barrel. For the first part I found that if the cannon was free to roll horizontally, its speed...

The eigenvalues of the matrix \left(\begin{array}{cc}0 & \frac{1}{2}\\\frac{1}{2} & 0\end{array}\right) are \lambda_1 = \frac{1}{2} and \lambda_2 = -\frac{1}{2} The problem here is that I have no idea of how to calculate the eigenvectors. Could some one please explain me, in detail, how...

The eigenvalues of the matrix \left(\begin{array}{cc}0 & \frac{1}{2}\\ \frac{1}{2} & 0\end{array}\right) are \lambda_1 = \frac{1}{2} and \lambda_2 = -\frac{1}{2} The problem here is that I have no idea of how to calculate the eigenvectors. Could some one please explain me, in detail, how...

I was assigned to decrypt this cipher text: EWPW DRAPO MGTGT EXVAH RPSWI LSFUN RZVSE FOIWJ NYOU MHSER EFBMB VANHA LOOXI VPBIF FIFMA BFGRH GARE TLKLF NZQXQ DWGKP UWNWQ QFRZL VROOP UGBQQ HVKS CDOPW LSGTE JMFSE MLZMD TNDED VVGRO UUMLV NLHA KWASO ITAPR DTBBG CHDSH TNSFM NGWMF CASWM...

STUCK on a few Simple Problems... I am stuck on a few of these problems. Yes they are HW related, but i have been working on them for over 4 days...I can not seem to get a handle on these few problems and help, Hints, Tips...If you want to give me the formula to use...I do not Expect people to...

I need to get the integral for sqrt(25+x^2). I can't seem to get the answer without a arcsinh. Can anyone help me? Thx in advance! :)

Help! Stuck on these 2 problems 1. Determine the motions equations of an ideal pendulum of mass m and lengh r. 2. A machine is formed by a homogenous cylinder of radio R and mass M. It rotates in its axel (frictionless). A mass by an inextensible cord (massless) is roller to cylinder. Find...

A body free fall into a viscous fluid. Calculate the dissipating speed of kinetic and potential energy during this motion into the fluid. ( suppose Yo initial height)

HELP! stuck on this problem A circle of rope of total mass 3.14kg and a radius of 2 meters is spinning at an angular velocity of 1 rad/sec about an axis through the center of the circle. What is the tension in the rope? any help or solution would be great!

A wrecking ball (weight = 5400 N) is supported by a boom, which may be assumed to be uniform and has a weight of 3800 N. As the drawing shows, a support cable runs from the top of the boom to the tractor. The angle between the support cable and the horizontal is 32°, and the angle between the...

1. A 66.3 g mass is attached to the end of an unstressed vertical spring (of constant 63.5 Nm) and then dropped. The acceleration of gravity is 9.8 m/s2 : What is its maximum speed? Answer in units of m/s. Im not quite sure that I understand what this problem is saying. Is the block...

A 500 g ball swings in a vertical circle at the end of a 1.5-m-long string. When the ball is at the bottom of the circle, the tension in the string is 15 N. What is the speed of the ball at that point?

stuck on this probability problem... this using normal distribution so an airline on average has 90% of ticket holders will not showup. So the airline sells more then seats it has to make it up. suppose the airline sold 260 tickets, and only has 240 seats. use the normal curve to...

Iam faced with a problem of controlling the rudder of my 20*30*15 (cm) boat.I need to take the motion for the rudder from the propeller motion, as a shaft cannot be incorporated. By the way,do i need a rudder at all to control the...

I was given this problem, but I don't know where to start? R(v) = dE/dv = (8(pie)(h)(v^3)/ (c^3(e^(hv/kT-1))). Recall that if you want the energy per unit wavelength, you cannot simply replace the argument v with c/wavelength. Instead you must write R(wavelength) = dE/dv = (dE/dv)(dv/d...

i have been at this time since 2 this afternoon, and I've only got 3 of 8 problems completely done. i need to get these done before i go insane. heres the first: plane x+2y=5 carries charge Ps = 6nC/m^2. determine E at (-1,0,1) okay, this is obviously a surface charge problem. and E =...

i'm stuck trying to figure out this probabilities problem for my thermodynamics class. the question is: consider an idealized drunk, restricted to walk in one dimension (eg. back and forward only). the drunk takes a step every second, and each pace is the same length. let us observe the drunk...

A lighter-than-air balloon and its load of passengers and ballast are floating stationary above the earth. Ballast is weight (of negligible volume) that can be dropped overboard to make the balloon rise. The radius of this balloon is 6.25 m. Assuming a constant value of 1.29 kg/m3 for the...

Here's the problem: A uniform rope with length L and mass m is held at one end and whirled in a horizontal circle with angular velocity omega. You can ignore the force of gravity on the rope. Find the time required for a transverse wave to travel from one end of the rope to the other...

integral of 1/(cscx-1) i can't think of any trig subs or anything...natural log prob? ;)...i udnno I'm truly clueless. all i need is a hint or more if u like ;) :wink: also, am i using integrals for this prob: Compute the average value of f(x)=x/(x+3) over the interval...

Can anyone help me: Lifting a sail up a mast. Sail is 825 kg, the distance is 5 meters. What's the force required (in Newtons)? Thanks to anyone helping - L. I calculated this a 8085 Newtons, using gravity at 9.8 m/sec2. I need help understanding the relationship between acceleration...

I've looked at the following problem several times and have gotten stuck. The Problem ----------- An earthquake-produced suface wave can be approximated by a sinusoidal transverse wave. Assuming a frequency of 0.50 Hz (typical of of earthquakes, which actually include a mixture of...

Consider a rope with length l and mass per unit length (lambda), hanging vertically. Let y refer to the height of a point P above the bottom of the rope. What is the tension at point P in the rope? Thanks a lot ppl... I know the answer should include y but not sure in what way...

Now I am supposed to find the magnitude of the vertical acceleration of mass 1, in terms of mass 1, gravity and the tension. I found that a_1= ((m_1*g)-2T)/2m_1 but that isn't right. Any help would be great

A mass, m1 = 9.04 kg, is in equilibrium while connected to a light spring of constant k = 122 N/m that is fastened to a wall A second mass, m2 = 7.31 kg, is slowly pushed up against mass m1, compressing the spring by the amount A = 0.220 m The system is then released, and both masses start...

problem with static friction and force I have been working on this problem all weekend and I just can't get it! A small object is placed 10cm from the center of a phonograph turntable. It is observed to remain on the table when it rotates at 33 1/3 rev/min but slides off when it rotates at...

I am currently working on a physics project. The idea is a measure rate of rotation of different gymastics flips (i.e tuck, twist, layout, pike). I calculated the moment of inertia for each of the different positions. I then taped a gymnast preforming the different flips on a trapoline. I...

T be a linear operator (I think they mean "Let T be a linear...") on a finite-dimensional vector space V, and let W_1 be a T-invariant subspace of V. Let x \in V such that x \notin W_1. Prove the following results:There exists a unique monic polynomial g_1(t) of least positive degree such that...

Here's some information : Two same sound sources of equal amplitude, and the intensity level at central maximum is 50dB ,how much intensity level at this point when one source is present ? What does it meant by intensity level at the central maximum ? Can somebody explain to me ?

x^(1/3) The only way I have for this on this is to show that the derivative of x^n equals Nx^(n-1). I can't think of a way to do it in first principles. If I can just break up (x+h)^1/3, I'm good. If you break that up, you get... x^\frac{1}{3} + 1/3x^\frac{2}{9}h^\frac{1}{9} +...

Hi, There has to be a simple way of solving this and I am missing it: A student throws a baseball at a maximum speed of 25 m/s towards a window 50 meter away (horizontally) and 13 meters high. Can he hit the window? (assume the base of the window starts at 13 meters off the ground). What...

I am trying to prove that AvB (which reads "A or B") is equivalent to Av~~B (which reads "A or not not B"). My steps are wrong... I checked them out on Fitch (the program we use in class to check validity of proofs). I can't write them out in here... I don't have the right symbols ... so maybe...

Ooops, sorry I posted in the wrong forum. Here are the problems. I have no idea where to start! I don't want the answer I just want a little clue to get me started. If someone could just explain to me the steps I should take to go about solving these problems. BTW, I am clueless about...

We want to show that the nth + 1 term of a sequence that is defined as x_{n+1} = b + ax_n, n\geq1 \ a,b \in \mathbb{R} is given by x_{n+1} = a^nx_1 + b\frac{1-a^n}{1-a} \ \mbox{if} \ a\neq 1 The manual suggests that we proceed by induction. Let us proceed by induction. :smile: P(1)...

i need to intergrate this function \frac{2mdx}{cx^2} from x to 0

i have a force acting on and object and I've gotten the question down to when i have to intergrate but I'm stuck on the intergral F=-(f+cv^2) m \frac{dv}{dx} \frac {dx}{dt} = -(f+cv^2) f and c are constants mvdv=-(f+cv^2)dx \frac{mvdv}{f+cv^2}=-dx now how do i intergrat them from...

okay well spent all day today working on these problems so my brain is now fried, I got about 2 left out of the 100 I had to do so it's not that bad I guess, but I'm stuck on these two and got no idea where to go. lets start with the one I got farthest in first (collision question): 1). A...

rotational kinematics problem I am stuck on please help! my problem says this: -a pendulum consisting of a string of length L attached to a bob of mass m swings in a vertical plane. When the string is at an angle Theta to the vertical, A) what ist he tangential component of acceleration of...

\textrm{(a) A sequence} \left\{ a_n \right\} \textrm{is defined recursively by the equation} a_n = \frac{1}{2} \left( a_{n-1} + a_{n-2} \right) \textrm{for} n \geq 3 \textrm{, where} a_1 \textrm{and} a_2 \textrm{can be any real numbers. Experiment with various values of} a_1...

1. Four horses together pull an old-fashioned drill of the type used to make big guns. It has four levers mounted horizontally on a revolving central axes. Assuming each horse pulls at the same angle of 45 degress to the radial lever of the drill, and pulls with a given force, T, how much...

Velocity from variable force(spring)? What is the velocity of the mass as it breaks contact with the spring? From part 1 I got: A 1.118 kg block is on a horizontal surface with mu-k = 0.150, and is in contact with a lightweight spring with a spring constant of 715 N/m which is compressed...

Q40. A boy stands at the edge of a bridge 20.0 m above a river and throws a stone straight down with a speed of 12.0 m/s. He throws another pebble straight upward with the same speed so that it misses the edge of the bridge on the way back down and falls into the river. For each stone find (a)...

A rock of mass 33 kg accidentally breaks loose from the edge of a cliff and falls straight down. The magnitude of the air resistance that opposes its downward motion is 239 N. What is the magnitude of the acceleration of the rock? I tried a=239*33 and I got 7.24 but that was wrong. Please...

A Uniformly Charged Slab. A slab of insulating material has thickness 2d and is oriented so that its faces are parallel to the yz-plane and given by the planes x=d and x= - d. The y- and z-dimensions of the slab are very large compared to d and may be treated as essentially infinite. The slab...

Hi Guys, I tried drawing a free body diagram, But the term 34.5 north latitude is getting on my nerves... the closest feeling i got wat it meant was the angle made between the Weight of the bob(line of action drawn Diagonally) and the horizontal. Q. A plumb bob does not hang exactly...

I am doing a sort of independent study of AP physics and I ran across a question that I am pretty sure requires either the law of sines or the law of cosines but I can't remember them, can anyone help me out? Thanks, HT

I am stuck on these 2 physics problems. Can anyone help? 1) A rock is dropped from a sea cliff and the sound of it striking the ocean is heard 2.5 s later. If the speed of sound is 340 m/s, how high is the cliff? 2) A first stone is dropped from the roof of a building. 2.30 s after that...