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Physics
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Peter4075
  • Member for 13 years, 3 months
  • Last seen more than a month ago
  • United Kingdom
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question
42
Don't understand the integral over the square of the Dirac delta function
Dec 30, 2012
question
41
Sun's power density compared to a compost heap
Nov 26, 2017
question
33
Why do objects follow geodesics in spacetime?
Apr 24, 2012
answer
18
Books for general relativity
Jan 31, 2012
question
10
Hubble time, the age of the Universe and expansion rate
Apr 7, 2012
question
9
Why doesn't dark energy vary with time?
Mar 30, 2012
question
8
Nature of spacetime 4-vector and tangent space?
Jun 17, 2011
question
8
Finding the correct units for the energy-momentum tensor?
Mar 9, 2012
question
7
Trying to understand the weak gravitational field metric (1)
Sep 10, 2011
question
7
Why two different Lagrangians to derive geodesic equations?
May 12, 2015
Top network posts
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44
Double superscript error
21
Does this smartphone photo show Mars just below the Sun?
19
What is the word for an animal species which only eats one type of food?
18
Using the same number for repeated use of the same equation
17
How do planetarium apps and software calculate positions?