Undamped Harmonic Oscillator Problem

1. The problem statement, all variables and given/known data

Find the initial conditions for 2 interchangeable harmonic oscillators (undamped) so that they have the same amplitude of oscillation.



2. Relevant equations

x(t)=Xm*cos(wt+ϕ)





3. The attempt at a solution

The...



Undamped Harmonic Oscillator Problem

Undamped Harmonic Oscillator Problem

Force, Horsepower and Acceleration logic?

hi guys,

Im not a science student but wanted help in understanding a few fundamentals.

Here is where i have learnt till please correct me if i am wrong.



is it correct if i state, "If you can lift 74.6kgs off the ground to a height of 1m in 1sec you have power = 1hp?"

i say that cause i read...



Force, Horsepower and Acceleration logic?

Force, Horsepower and Acceleration logic?

How can I replicate conditions on pin on disc test

Hello,



I need to replicate the conditions of a clutch on a pin on disc tribometer to measure the coefficient of friction. However the tribometer I have access to can't spin faster than 1000 RPM. The clutch will reach speeds from 3000 RPM to 9000 RPM. I calculated the normal force required on...



How can I replicate conditions on pin on disc test

How can I replicate conditions on pin on disc test

Law of Mass Action, where does mass come from?

1. The problem statement, all variables and given/known data





2. Relevant equations

I need help.



3. The attempt at a solution

Please, please, please could someone tell me where the mass m₀ term comes from??? I'm at the...



Law of Mass Action, where does mass come from?

Law of Mass Action, where does mass come from?

Why does speed of DC motor increase when flux is reduced?

I understand that from KVL

e = v -IaRa



e=k(flux)speed

speed=(constant)*(V-IaRa)/flux



But physically what causes the speed to increase?



What force causes the rotor to accelerate?



In fact physically, the rotor is moving because of field flux interacting with armature current's flux.

So...



Why does speed of DC motor increase when flux is reduced?

Why does speed of DC motor increase when flux is reduced?

how to calculate equivalent inertia of an engine?

Hello, is there a formula or technique to calculate the equivalent inertia of an engine?



I think I will have to add up all the inertias of everything else rotating inside it but it has so many components like cams, followers, pulleys, water pump, crank, flywheel etc. What sort of effect will...



how to calculate equivalent inertia of an engine?

how to calculate equivalent inertia of an engine?

.3333.... equals to

I just show how .999.... = 1



Let x = .999....

10x = 9.999...

10x - x = 9.999... - .999...

9x = 9

x=1



So according to the above .3333.... shows as 3.



Let x = .3333...

10x = 3.333...

10x - x = 3.333... - .333...

9x = 3

x=3



But according to me, .333.... should equal to .4 , isn't it?



I must be...



.3333.... equals to

.3333.... equals to

Double Valve Spring

In some motorbike engines, I notice there are two springs (inner and outer) for a valve. Why do they have to make it two ?

Thanks

Double Valve Spring

Urgent help! Circuit problem for Physics.

I need to solve for the equivalent resistance of the circuit below:

Voltage is 100volts. R1=6ohm, R2=8 ohm, R3= 4 ohm, R4=8 ohm, R5= 4 ohm,R6=...



Urgent help! Circuit problem for Physics.

Urgent help! Circuit problem for Physics.

Flat plate heat exchanger - Hand calculations help

I am designing a flat plate heat exchanger for a project and im not sure where to start with the hand calculations, specifically the LMTD and E-NTU methods, also how to work out the parameters which i will need to complete these methods such as area and number of plates. My deadline is soon, any...



Flat plate heat exchanger - Hand calculations help

Flat plate heat exchanger - Hand calculations help

Complex Analysis: Theorem Name

Hi,



In my textbook the following theorem is designated "Proposition 3.4.2 part (vi)". There are 6 parts total in the overall theorem. I'll just type the part I'm interested in below. My question is, is there a more standard name for this theorem? I would like to find an additional...



Complex Analysis: Theorem Name

Complex Analysis: Theorem Name

Referential Integrity Details.

Hi a probably dumb question on Referential Integrity:



I think I understand the basic idea/motivation for it, but one thing I am confused about is this: just when/how

do we declare a column in a given table T' to be a foreign key related to the primary key for table T? Is it when we...



Referential Integrity Details.

Referential Integrity Details.

Stress in a squeeze ball

Hi,



I have two squeeze balls with pressure sensors inside them. One squeeze ball(Ball A) has a sensor placed at the center while the other one(Ball B) has two sensors, placed very close to the two opposite surfaces. These squeeze balls act as an input to a game developed. Depending upon the...



Stress in a squeeze ball

Stress in a squeeze ball

Aerospace engineering at Imperial?

Hello, apologies if this is in the wrong section of the forums. I was wondering if anyone could tell me about the Aeronautical course at Imperial. I want to learn about space crafts as well, but imperial only offers Aeronautics, unlike US universities like caltech which have aerospace programs,...



Aerospace engineering at Imperial?

Aerospace engineering at Imperial?

Black holes in the globular cluster M22 with Dr. Tom Maccarone

Dr. Tom Maccarone is a coauthor of the paper, “Two stellar-mass black holes in the globular cluster M22”, and is Associate Professor,Department of Physics, at Texas Tech University...



Black holes in the globular cluster M22 with Dr. Tom Maccarone

Black holes in the globular cluster M22 with Dr. Tom Maccarone

Vendor for Flint Glass Block or Prism

Hi,



I'm trying to put together materials to demonstrate the Faraday Effect. I need to locate the supplier of some flint glass (glass with lead oxide or similar materials increasing the Verdet constant), that I could use in my lab. I had found this from Mansion Schools:...



Vendor for Flint Glass Block or Prism

Vendor for Flint Glass Block or Prism