Recent content by Name15

Homework Statement A cylinder with varying diameters is being filled and emptied at the same time. The time is measured. I know Flow rate into cylinder. How do I find the height of fluid in the cylinder at a particular time? The diameter of the hole is 0.005m. The diameter of the bottom of the...

Quick question regarding d'Alembert, for a function f(x)=x at time t=1 and c=1, should I get a translation of 1 or 0.5? I thought the ct should be multiplied by the 0.5 from the d'Alembert solution giving a translation of 0.5, but something I read tells me otherwise..

thank you so much for your help!

So to get a range from 2.5(-2) to 2. 5(-4) , I should use -f(-x), which gives -2.5(5+x)? If i plug in -1 and -3 into this i get the range you mentioned.

Ok I think I'm getting there. So i only want solutions in the negative axis, and -x wouldn't work since it'll give a positive solution for negative x values. However, 2.5(x-5) (-3 <x ≤ -1) would work as this gives a negative solutions?

Thanks for the response. I'm still a little confused, I thought I these were the odd functions for x is less than 0: -x (-1 <x ≤ 0) 2.5(x-5) (-3 <x ≤ -1)

Homework Statement Wave equation: ytt=yxx Initial conditions: Y(x,0) =f(x) = x (0 ≤ x < 1) 2.5(5-x) (1 ≤ x < 3) 0 (Otherwise) and yt(x,0) = 0 Boundary condition: y(0,t) =0 Semi infinite domain: 0 ≤ x < infinity Homework Equations d'Alembert solution...

The problem is only C and D are 0V (A and B are both 5V), so I don't know how to do this problem. I've only been taught binary inputs where there is only one input.

Hi, I don't understand why Vref = 0. I have 2 inputs; 5V and 2.5V. I thought one or both of those would be Vref. Also if Vref is zero, wouldn't Vout also be zero?

Homework Statement Simplify in order to find voltage output. Homework Equations Vout= -Vref x (A + B/2 + C/4 + D/8) The Attempt at a Solution Firstly is this even correct? Secondly, I have 2 voltages (2.5V and 5V), what should I do now? what is my Vref?

Hi, thanks for your help! But why would I find Torque and current at 100 rad/s and not 126 rad/s? Continuing from your calculations: I find Torque = (0.749 Vs)x(39A) = 29.2 Nm. So using P=Tw; Power = 29.2 x 126 rad/s = 3681 W. Power input to motor = (39 x 110) = 4290 W. So power loss is (4290 -...

Homework Statement A permanent magnet DC motor has an armature resistance of 0.4 Ohms. When a voltage of 110 V is applied to the motor it reaches a steady-state speed of rotation of 126 rad/s and draws 39 A. (a) Find the power loss in the armature (b) the power input to the motor I really...

q1 is distance from wall to m1 q2 is distance from wall to m2

Homework Statement Question: Does the force F(t) acting on mass m1 affect the equations for kinetic and potential energy of the system? Homework Equations F(t) is known V(q) is potential energy | T(q) is kinetic energy The Attempt at a Solution I think PE is not affected. I think KE...

just A, which is 10v? so Vs is simply 10v?