Homework Statement
Question is attached
Homework Equations
σ(x) = 0
σ(y)= P/A
t(xy)= Tc/j
The Attempt at a Solution
I know how to do the stress transformation, but my only issue is noticing why σ(x)= 0, I cant see it, can someone help me.
Homework Statement
As an electron moves from a high potential to a low potential, its electric potential energy?
a) increases
b) remains the same
c) decreases
Homework Equations
we know that
V=U q0
the electric potential = potential energy times the charge.
The...
Homework Statement
Determine the reaction at C.
Homework Equations
The Attempt at a Solution
i know i have to take the moment about line DB
and thus resulting in
ƩM(DB)= λ(DA X F) + λ(DC X RC) =0
where λ = DB/ DB
however the book solved it differently. they instead do...
Homework Statement
An opening in a floor is covered by a 1×1.2-m sheet of plywood of mass 18 kg. The sheet is hinged at A and B and is maintained in a position slightly above the floor by a small block C. Determine the vertical component of the reaction (a) at A, (b) at B, (c) at C.
Homework...
I did write the whole code and declared all my variables. i just didnt want to post it fully here for some reason or the other. I apologize. here is the whole code.
#include<iostream>
using namespace std;
int main()
{
int count;
int num;
int x;
count=1...
C++-- while-loop
Homework Statement
calculate the 3 largest number of a sequence
Homework Equations
you ask the user to input a sequence of numbers, and enter the value 0 to stop entering numbers.
c++
The Attempt at a Solution
i managed to calculate the the maximum of the series of...
Homework Statement
Figure 22-7a shows three particles with charges q1= +2Q,
q2=-2Q, and q3 = -4Q, each a distance d from the origin.
What net electric field E is produced at the origin?
Homework Equations
E=q/r^2* 1/(4∏ε0)
The Attempt at a Solution
So i calculated the of each particles...
Homework Statement
integrate 2t^(2)/(1+t^2)^(2)
Homework Equations
trig sub 1+tan^2(x)= sec^2(x)
The Attempt at a Solution
the attempted solution is attached.
And since there are no external forces acting on it, then momentum is conserved. so, we have to finish with what we started.
if there was a external forces, such as in a rocket thrust problem, then we will have to involve impulse, in order to calculate the the Vf of the rocket, right?
@Rude man, im confused. so in general, M(total) *V(initial)= M(train)*V(final train) + m(of sand)* velocity( throughout the 30 mins)
which gives me vf=20m/s. which is sort of weird, since is the same velocity we started with.
Is it okay to think of it this way; that in order to have...
It is an example question from old quizzes. why? the problem doesnt make sense? can someone help me?
so would it be (100,000)(20)= (85,000)(vf) +(15,000)(20)?
because the sand that is falling out, has the same speed of the cart throughout the 30 mins