1,581 reputation
925
bio website ForTheScience.org
location Amsterdam, The Netherlands
age 37
visits member for 3 years, 8 months
seen Dec 5 '13 at 12:19

Jun
1
accepted What is exactly a Dobsonian, and what are the differences when compared with Schmidt-Cassegrain or Newtonian?
Jun
1
asked How are Cepheids used to evaluate their distance?
Jun
1
asked Why is M42 red in the pictures, but green when observed at the eyepiece?
Jun
1
asked What is exactly a Dobsonian, and what are the differences when compared with Schmidt-Cassegrain or Newtonian?
Jun
1
asked Lenses (refractor) or mirrors (reflector) telescope?
Jun
1
asked What does f/4.6 mean in a telescope and how important is this value?
Jun
1
asked Best periods to observe Magellanic Clouds?
May
31
comment Would a car tow rope withhold an adult person?
Remember a very important point. Climbing ropes are made so that they stretch and elastically absorb the stretch. This is, of course, because if you fall, a rigid rope would bring you to a sudden stop and likely break your body from the snap. Tow ropes are rigid, so your question may hold an intrinsic danger which I consider important to point out.
Feb
19
comment Decompressing gas whilst driving a turbine - where does the energy come from?
actually, to make the thing even more efficient, they could open a refrigerated storage facility in the same building.
Feb
18
asked The speed of gravity?
Feb
3
accepted Why is quicksilver (mercury) liquid at room temperature?
Feb
3
comment Why is quicksilver (mercury) liquid at room temperature?
@Georg: I thought it was the layperson name. I always call it mercury, but I assumed non-scientific people may search for quicksilver on google.
Feb
3
asked Why is quicksilver (mercury) liquid at room temperature?
Jan
27
revised Eyes open under water
added 58 characters in body
Jan
27
accepted Eyes open under water
Jan
27
asked Eyes open under water
Jan
25
comment How does the Kinect device work?
@Georg : it appears so
Jan
25
revised How does the Kinect device work?
added 519 characters in body
Jan
25
answered How does the Kinect device work?
Jan
12
comment How to describe a well defined “zero moment” in time
Yes, but UTC does not define a unique, unambiguous and exactly traceable "zero" in its scale.