# Popular pages

Showing below up to 50 results starting with #1.

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1. Main Page ‎(342,693 views)
2. Create a Substepr user account ‎(47,827 views)
3. Topics (listed alphabetically) ‎(19,140 views)
4. Find the probability of a player being given exactly one ace in a Bridge deal ‎(18,762 views)
5. Build an all-electric car ‎(18,406 views)
6. Quantum field theory ‎(18,077 views)
7. Create a new page in Substepr ‎(16,384 views)
8. Login to an existing Substepr user account ‎(13,113 views)
9. Use COMSOL Multiphysics to make a 2D simulation of Poiseuille flow ‎(13,060 views)
10. Mathematics ‎(11,754 views)
11. Find the distribution of the number of observations until the value of the first observation is exceeded. ‎(11,605 views)
12. Contribute to an existing page in Substepr ‎(9,050 views)
13. Integrate using 'Integration by parts' ‎(8,965 views)
14. How to get started with Substepr ‎(8,675 views)
15. Calculate expectation values for $$x^4$$ in state $$n$$ using ladder operators ‎(8,653 views)
16. Find the probability that the larger of two iid samples exceeds the population median. ‎(7,391 views)
17. Donor name or URL submission instructions ‎(7,092 views)
18. Build the open source car suggested on www.theoscarproject.org ‎(7,032 views)
19. A few words from the founder ‎(6,473 views)
20. Physics ‎(6,464 views)
22. Plan the construction of a modern-day pyramid as an open project hosted by Substepr ‎(6,289 views)
23. Top donors ‎(5,816 views)
24. Use the Trachtenberg speed system to multiply 98834 by 11 ‎(5,154 views)
25. Use the Trachtenberg speed system to multiply 715624 by 11 ‎(5,101 views)
26. Trachtenberg speed system of basic mathematics ‎(4,906 views)
27. Create something profound ‎(4,783 views)
28. Biology ‎(4,610 views)
29. Show that the Holstein-Primakoff transformation satisfies the spin commutation relations ‎(4,444 views)
30. Derive the equations of motion for a simple harmonic oscillator ‎(4,331 views)
31. Use the Trachtenberg speed system of basic mathematics to multiply 443052 by 6 ‎(4,311 views)
32. Use the Trachtenberg speed system to multiply 441362 by 11 ‎(4,247 views)
33. Engineering ‎(4,212 views)
34. Show that the scalar (or inner) product of position $$x$$ and momentum $$p$$ can be written as an exponential in terms of $$x$$ and $$p$$ ‎(4,022 views)
35. Use the Trachtenberg speed system to multiply 413 by 12 ‎(3,935 views)
36. Show that if the lowering operator acts on a non-zero eigenstate of the number operator, the result is also an eigenstate of the number operator ‎(3,809 views)
37. Find a fossil ‎(3,724 views)
38. Use the Bogoliubov transformation to diagonalise the BCS superconductivity Hamiltonian ‎(3,714 views)
39. Quantise the coupled harmonic oscillator ‎(3,701 views)
40. Make a humanoid robot that can sprint faster than a human ‎(3,610 views)
41. Chemistry ‎(3,596 views)
42. Calculate expectation values for $$x^2$$ in state $$n$$ using ladder operators ‎(3,578 views)
43. The Top Donors list ‎(3,573 views)
44. Computer science ‎(3,522 views)
45. Build a Reprap 3-dimensional printer ‎(3,462 views)
46. Make replica plates of a particular Petri dish ‎(3,349 views)
47. Use the mean field approximation to simplify the BCS superconductivity Hamiltonian ‎(3,321 views)
48. Show that the bosonic commutation relations of the creation and annihilation operators are preserved by the Bogoliubov transformation ‎(3,306 views)
49. Use the Trachtenberg speed system to multiply 63247 by 12 ‎(3,134 views)
50. Derive the variance of a uniform distribution. ‎(3,098 views)

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