126 reputation
9
bio website eosweb.dk
location Denmark
age 25
visits member for 3 years, 1 month
seen yesterday

Student in mechanical engineering at The Technical University of Denmark, DTU.

My focus is material science, energy materials and thermodynamics. I need my daily dose of these to sleep well at night.

Partner at Eos Web I/S.


Sep
14
comment Thermodynamics phase change question
Do you mean, why the specific volume is bigger at higher pressure before it starts vaporizing? Are you at the Saturated Liquid line?
Sep
12
awarded  Critic
Jul
14
comment Is the expansion accelerating or decelerating?
You mean "distance of 5 and 10 billion light years".
Jul
6
comment Kinematics question - Newton's Law of Motion
Thank you, @dmckee, the problem starts in the very first line in the answer, I can see. Newton's 1st law in the upwards direction: $-mg+n\cos\alpha =0$. Where is the problem here? The issue should be that $n$ is larger because of the incline acceleration. But I assume $m$ and $g$ to be constants... So how can $n$ grow, and this equation still hold?
Jul
5
comment Kinematics question - Newton's Law of Motion
@dmckee, good point. But... will newton's laws not apply then?
Jul
5
comment Kinematics question - Newton's Law of Motion
If you did not include $−1$ in the denominator of the correct answer that you provided, then it would fit, since $\tan\alpha = \frac{1}{\cot \alpha}$. Will you double check that this should indeed be the correct answer?
Jul
5
comment Kinematics question - Newton's Law of Motion
Yes exactly. You just forgot to divide with $\cos\alpha$ instead of multiplying. You can see that in the answer.
Jul
5
comment Kinematics question - Newton's Law of Motion
If you draw a free body diagram for the incline there will be the horizontal pulling force, gravity, normal force from the flat surface AND a normal force from the small block. This latter one is acting perpendicular to the incline. Therefor it has a y- and x-component. The x-component must be included when you sum up all forces in the horizontal direction.
Jul
4
revised Kinematics question - Newton's Law of Motion
added 303 characters in body
Jul
4
answered Kinematics question - Newton's Law of Motion
Jul
4
awarded  Commentator
Jul
4
comment Speed of Water in a River
You will need to assume something like that the term "the river flows faster" means "more volume of water per second is flowing through a crosssection". The "speed" of a river is not very specific, since the speed varies from point to point.
Jul
4
comment Attraction and repulsion of electron spin ups and electron spin downs
No question 5?...
Jul
4
revised Cooling induction current generation
deleted 6 characters in body
Jul
4
comment Cooling induction current generation
@user52813 To ask "Is there a specific temperature of the conductor at which the outwards heat transfer is the highest?" is another topic. The higher the temperature, the higher the heat transfer to surroundings, since thermal conduction and radiation etc. increases with increasing temperature. This is another question.
Jul
4
comment Cooling induction current generation
Well, 100% of the heat transfer is caused by electron movements. They "bumb" into latice atoms and tranfer there kinetic energy to those atoms. This effect tends to follow Ohms law that derives to $P=R I^2$, where $R$ is a component constant. So the more or the faster electrons (that is, larger current $I$), the larger the power, which is your heat loss every second.
Jul
4
revised Cooling induction current generation
added 19 characters in body
Jul
4
awarded  Teacher
Jul
4
revised Cooling induction current generation
added 53 characters in body
Jul
4
answered Cooling induction current generation