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7 votes

How accurate does the ISS's velocity and altitude need to be to maintain orbit?

For a particular orbital period and altitude (or altitude and eccentricity, or eccentricity and period), there is exactly one velocity that produces the correct orbit. Of course the ISS doesn't have ...
controlgroup's user avatar
0 votes

Would a gauss rifle based on generated magnetic fields have any kickback?

There is one questionable assumption that the pro-recoil camp is making. A normal firearm PUSHES the projectile down the barrel. The force applied is from a single direction horizontal to the user. A ...
IDave's user avatar
  • 1
1 vote

Boat floatation load

Based on the displaced volume of water you gave, the buoyancy in pound-force (weight of the volume of water displaced) is about 400 lbf. That is obviously insufficient to float the boat in the picture....
Bob D's user avatar
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