Tagged Questions
0
votes
0answers
30 views
Modern Physics/Theoretical Uncertainty? [closed]
A bumblebee is flying around your kitchen with an average speed of 5.0 m/s. You very carefully measure its position to be 3.01 m in the x direction, 0.25m in the y direction, and 1.23 m in the z ...
1
vote
1answer
37 views
Measurement uncertainty of the quantity, that is function of two others quantities
I'm trying to compute uncertainty for the density of the ball.
I measured its radius 6 times, so I was able to compute the stastistical uncertainty (we call it uncertainty type A, I don't know, if ...
1
vote
3answers
101 views
Error calculation with linear regression
I am trying to determine the boltzmann constant by using a bipolar junction transistor.
In my circuit (apparently I don't have enough point to join a image sorry), the Ebers and Moll model gives the ...
0
votes
1answer
220 views
Two cylinders with same volume but different dimensions
If there are two cylinders (A and B) both with the same volume. B's radius is half of A's, so the length of B must be 4 ($2^2$) times that of A.
The uncertainty for the radius of A is the same as ...
2
votes
0answers
303 views
How to calculate uncertainties of a natural exponential function?
(I apologize if this should be posted in mathematics, however I chose to post it here as it's technically about physics)
I conducted an experiment in which position of items were shifted on an ...
1
vote
1answer
74 views
Calculating uncertinity in measurements [closed]
I have a question relating to uncertinity.The equation used is period of a pendulum.
T=2π √(l/g)
For example consider time to complete 10 cycles by the pendulum as 19.6 (+/- 0.2)s.
I want to know ...
0
votes
3answers
213 views
Significant Figures
Subtract 0.2 J from 7.26 J. Express your answer to the correct number of significant figures for the given data.
I think its 7, but the answer is 7.1. HOW?
0
votes
0answers
248 views
Error Analysis, Change in momentum, Kinetic Energy
If momentum of an object is increased by 10%,then its kinetic energy will be increased by?
Well, I don't need the solution logically by calculating the change in Kinetic Energy etc, but my question ...
1
vote
1answer
484 views
Calculating the Uncertainty for an Average Value [closed]
How would I calculate the uncertainty for the average of this set?
$32.5 \pm 0.1$
$32.0 \pm 0.1$
$32.3 \pm 0.1$
2
votes
2answers
524 views
Calculating uncertainty in the final result (combining uncertainties)
I'm struggling to determine the uncertainty in $F$ so it would match the textbook answer.
The problem statement is: A force F is obtained using the equation: $F = \frac{mv^2}{2\pi(x_2 - x_1)}$.
The ...
4
votes
5answers
358 views
The approximate uncertainty in $r$
The volume of a cylinder is given by the expression
$V=\pi r^2 h$
The uncertainties for $V$ and $h$ are as shown below
$\begin{align}
V&\pm 7\%\\
h&\pm 3\%
\end{align}$
What is the ...
