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John H. K.
  • Member for 7 years, 4 months
  • Last seen more than 1 year ago
49 votes
2 answers
10k views

How was Volkswagen able to trick the lab pollution test?

  • 1,158
29 votes
10 answers
8k views

Is it possible to build an air compressor with no moving parts?

28 votes
4 answers
27k views

Why do hydraulic systems use special fluid - what's wrong with water?

  • 5,930
22 votes
3 answers
2k views

How to know whether the flow is supersonic in a nozzle?

  • 1,423
13 votes
3 answers
10k views

How different are dc motor designs from dc generator designs?

  • 2,559
12 votes
2 answers
571 views

Does a Faraday cage effectively act as a notch filter?

10 votes
1 answer
633 views

Response of a system to a step function (Heaviside function)

9 votes
4 answers
11k views

How does pressure change with depth in earth?

8 votes
1 answer
460 views

Can using different types of alcohol in a cloud chamber produce different particle tracks?

  • 2,485
7 votes
3 answers
251 views

What is "flow instability" in porous media?

  • 2,149
0 votes
1 answer
69 views

What is the technical term for a document that contains the results of a final test for a specific product?

  • 1,618