After concluding an investigation about the coriolis effect, I wondered how this phenomenon affected the solar system and in particular the moon. Since the moon is a body that moves within the rotating system formed by the sun and the earth, an apparent deviation in the moon's path would be...
Hi all !
I wonder if I'm right.
(From : Fundamental University Physics, Volume 1 (Mechanics) - (Marcelo Alonso, Edward J.finn) Addison Wesley 1967)
This is my try:
* I have the Greek version of the book and there is no answer.
Thanks.
Summary: Which of these hypothetical propulsion methods is the best for a spacecraft during Interplanetary flight? Let’s just assume all at this point are cost-effective at the time.
Consider the
•Safety of the engine
•The speed
•The efficiency
1.) Monoatomic hydrogen propulsion
2.)...
i tryed putting all the number into that equation but it does not work, i have no clue if i need to include the angle to solve this or not and if i do i have no clue how i would
Given the figure, how can i arrive to this formula knowing that angular momentum is conserved?
I know that p = mv and L = p x r. So the initial momentum will be L1 = mV x R and the final momentum will be L2 = mv x r.
I am not sure how R will equal to b since the distance between the...
I' m trying to derive the work done by a torque from W = ∫ F ⋅ ds and I' ve looked up the internet, it said:
W = ∫ F ⋅ ds ( since ds = dθ × r ) ---------------------------------------- ( Line 1 )
it can be written as
W = ∫ F ⋅ dθ x r
this is a vector triple product , thus can also...
Homework Statement
(Please check the attached image)
2. Homework Equations
The Attempt at a Solution
Those are my answers. I thought the magnitude of the applied force would be bigger because that would be responsible of keeping the block on that spot without having it pulled back by the...
Homework Statement
Hello! I have a physics problem that I can't solve. I'm supposed to describe how I can calculate the mass when knowing the µv (I don't know the english term but i'm guessing friction...something (friction when the object is not moving)). You are allowed to use a dynamometer...
Hello,
I have been accepted for a physics teacher position in a high school. This would be my first job ever. I taught "tutored" students before in my home university for two semesters, and I think I am a good teacher. But, I feel that teaching high school students is totally different.
I am...
Hi everyone,
I have an absorption spectrum that I obtained from a sample after radiation and I need to use the background sample as a reference, how can I do that using excel?
what I did is subtract the radiated from the background spectrum then plot it, is that right?
Thanks.
Homework Statement
A point particle of mass m and charge q(>0) approaches to a point particle Q(>0) at a fixed position. When the distance between the two particles is L, the speed of the moving particle is v. The permittivity of the vacuum is denoted as Epsilon0. Find the minimum distance...
Homework Statement
If you have an object say in a vertical pipe, which only has a gravitational force acting on it would the reaction forces only be friction forces?
If this is the case how would you calculate the forces? would you calculate the friction force using the friction coefficient or...
Homework Statement
if a beam fixed at two points is on an angle say 45 degrees from the x or y axis instead of running parallel to x axis in most questions does this effect calculations? The force acting upon it would be a load directly downwards
Homework Equations
N/A
The Attempt at a...
Hi,
I am working on Maxwell version 17. I have a simple motor to analysis 2D FEM.
However, when I analyze the model, I see this error.
"Maxwell2d solver, process solver2d error: Internal Solver Error: 'Transient solver handles only isotropic conductivity!'. (7:07:10 PM Apr 16, 2018)"
I am...
Hello, I’m an undergraduate physics student. Recently, I recognize that I am interested in evolution and I want to study life’s origin. When I preferred physics, because I want to learn how nature works. Now, I am not only interested in how nature works, also I’m passionate for neuroscience and...
My understanding of Bernoulli's Principle is something like this: Pressure is inversely proportional to velocity. Fluid flowing through smaller cross-sectional area has increase velocity & decrease in pressure.
Also P = F/A.... so would force also decrease for fluid going through small area...
Hi,
I am confused about the electric field lines which are depicted mostly on the Internet as per conventional way.
What I understand that the conventional current was due to positive charges which was wrong. Actual flow of the current was due to the negative charges or electrons. When the...
Homework Statement
Homework Equations
The Attempt at a Solution
When the circuit moves creates magnetic force that moves the some charges in the wire and that is a current.
That is what i thought.
F = Q.v B sin theta
B = ( permeability Of vacuum* I)/(2pi.r)
But how to find the I?
Thank...
I'm writing a novel and wanted to research a possible weapon I came up with to make sure the physics are at least possible. However, I could not find anything on vacuum-based projectiles other than ping-pong balls, while this is interesting, but it doesn't answer my question on what would happen...
<Moderator's note: Moved from a technical forum and thus no template.>
Here’s the question
Design a simple expirament that you could carry out in your own home to
i) determine coefficient of friction between your object and surface
ii) prove that coefficient of static friction is only...
As a student taking my first step into rotational physics in a classroom filled with students who have a year of this ahead of me I beg for help! :P
So what is Rotational velocity? What does it define? How do signs work with rotation? What does its acceleration mean? Angular Velocity is...
[Mentors' note: No template because this thread was moved from the General Physics forum]
Ok so first of all believe me i would not make a new post if i found the answer anywhere online but i i couldnt find it.
Right now i am doing an experiment to find the frequency of a bouncing ping-pong...
So I know if you move a charge in a magnetic field it induces voltage and hence a flow of charge is created which is current. ( Please correct me if I'm wrong). But that's pretty basic right. However, I'm having trouble understanding the use of split rings in the functioning of a motor. I would...