Tagged Questions
2
votes
2answers
104 views
Does inertia increase with speed?
I have heard that when the speed of the object increase, the mass of the object also increase. (Why does an object with higher speed gain more (relativistic) mass?)
So inertia which is related to ...
0
votes
0answers
35 views
Special relativity: Related speed [closed]
If a sheep is moving in a velocity of 2mph related to a train, and the train is moving in a velocity of 2mph related to the ground what is the velocity of the SHEEP related to the ground.Is there an ...
5
votes
1answer
239 views
What is the speed of time
When we measure the speed of a moving element we do it with the help of a reference frame. Now if we need to measure the speed of time, is it possible? Is time really has speed?
Thanks in advance.
2
votes
2answers
627 views
Why does an object with higher speed gain more (relativistic) mass?
Today, in my high school physics class, we had an introductory class on electromagnetism. My teacher explained at some point that an object with a very high speed (he said it started to get somewhat ...
2
votes
2answers
127 views
Speed of Entropy change
If time in systems moving with different speed goes differently, does speed of entropy change differ in these systems?
(is "speed of entropy change" a valid term? can we compare them?)
0
votes
1answer
136 views
Approximate Time Dilation at Rocket Speeds
How do you calculate the time dilation effect experienced by a traveler traveling at a relatively low speed?
Specifically, how much time dilation would a traveller moving at $v=0.0007 c$ (speed of ...
1
vote
1answer
228 views
speed of light flashlights question
This might be a silly question but I take the risk because it's been puzzling me for quite some time :
If you have 2 flashlights, one facing North and one facing South, how fast are the photons (or ...
5
votes
5answers
1k views
Maximum speed of a rocket with a potential of relativistic speeds
Ultimately, the factor limiting the
maximum speed of a rocket is:
the amount of fuel it carries
the speed of ejection of the gases
the mass of the rocket
the length of the rocket
...
3
votes
1answer
387 views
How does a particle of light reach the max speed of light? [duplicate]
Possible Duplicate:
How can a photon have no mass and still travel at the speed of light?
First of all I am not a professional physicist. I was curious as to how a particle of light can ...
5
votes
2answers
754 views
How to compute the speed of sound in relativistic hydrodynamic?
In Weinberg: Gravitation and Cosmology chapter 2.10 (Relativistic Hydrodynamics) the speed of sound is derived as
$v_s^2 = \left(\frac{\partial p}{\partial \rho}\right)$
and the equation of state ...
10
votes
9answers
3k views
Accelerating particles to speeds infinitesimally close to the speed of light?
I'm in a freshmen level physics class now, so I don't know much, but something I heard today intrigued me. My TA was talking about how at the research facility he worked at, they were able to ...
