Recent content by zmike

  1. Z

    Lifetimes of jet aircrafts and their engines

    This is an interesting article! I didn't know that the engines of planes have to be replaced often. It's amazing how different types of aircraft have different lifespans, and it's interesting to see the difference in engine cycles for narrowbody and widebody aircraft. Thanks for sharing this...
  2. Z

    Plasma thruster - plasma instability in magnetic nozzle

    It's really exciting to hear about this research! It sounds like plasma instability could be a great solution for the plasma detachment problem associated with magnetic nozzle plasma thrusters. Hopefully this research will lead to new breakthroughs in space travel and propulsion.
  3. Z

    NASA Inflatable heat shield a ‘huge success’, NASA says

    Wow, this is great news! It is amazing that NASA was able to increase the size of their heat shield significantly to reduce the heat stresses during reentry and the technology demonstration was a huge success. It is exciting to think that this technology could be used to help put humans on the...
  4. Z

    NASA NASA - Venus Technology Plan (DRAFT) December, 2018

    It looks like there is a lot of potential for using high-temperature systems and components for long-duration surface operations on Venus. The technology plan provides interesting insight into the aerial platforms that could be used for measuring atmospheric chemical and physical properties, as...
  5. Z

    Missing Water on Mars: Hydrated Crust Minerals May Explain

    Can you provide a link to the picture of the model you are referring to?
  6. Z

    Could This New Map Projection Revolutionize Our Understanding of the Globe?

    This is interesting! It sounds like this map could be a real improvement over existing map projections. I'm curious to know how it stacks up against other map projections. Has anyone tried it out and compared the results?
  7. Z

    Deep Martian Geology: Signs of Plate Tectonics & Dynamo?

    stripes in the crust that suggest that Mars did indeed go through a period of plate tectonics and had a geological dynamo generating a global magnetic field, which could have protected its atmosphere from the solar wind. It's really interesting to think about what Mars was like billions of...
  8. Z

    Meridional Heat Transfer - Ocean and Atmosphere

    Hello! It sounds like you are having some difficulty understanding the meridional heat transfer figure. It can be tricky to understand why the ocean and atmosphere behave the way they do. I think the best way to approach this is to look at the factors that influence the distribution of energy in...
  9. Z

    Are There Any Paleoclimatologists In Here?

    for the map, it is helpful in visualizing the land formations. Although the land formation changes slowly, weather patterns can change dramatically over a short period of time due to environmental factors like ocean currents and atmospheric pressure. It is difficult to accurately predict what...
  10. Z

    How Many Mixes to Complete Geometric Dilution of Two Powders?

    1. Homework Statement you are geometrically diluting/mixing 0.1 g of powder A with 100g of powder B, how many times do you have to mix the 2 together to finish the process? *each time you can only mix an equal portion of powder B to what you currently have mixed. Eg. 1:1 2:2 4:4 3...
  11. Z

    How Many Mixes to Complete Geometric Dilution of Powders?

    Homework Statement you are geometrically diluting/mixing 0.1 g of powder A with 100g of powder B, how many times do you have to mix the 2 together to finish the process? *each time you can only mix an equal portion of powder B to what you currently have mixed. Eg. 1:1 2:2 4:4 The...
  12. Z

    Percent weight and particle size

    Is there a difference between percent weight and percent number? I am working with particle size and I am really confused because I would expect that they would be the same? eg. WEIGHT----Number of particles 5---3 2---1 8---1 % weight of 3 would be 3*5/(5*3+2*1+8*1) = 60%? % number of...
  13. Z

    How can nitrogen be both acidic and basic in organic molecules?

    I've been trying to brush up on my ochm but I haven't been able to find any solid/reliable rules on how to determine if a nitrogen is acidic or basic. For eg. If a 5 carbon ring with nitrogen, it would be considered acidic but it has no protons. I would really appreciate some help on...
  14. Z

    Keq Concept: No Liquids in Keq

    So I see in my book that for an acid dissociation, the Ka = K eq [H 2 O] and that the Keq includes H2O in the eqn. Shouldn't there be no liquids in Keq? Keq = [H 3 O + ] [A - ] [HA] [H 2 O] Why is there H2O in Keq? If I am asked to calculate Keq do I have I have to include...
  15. Z

    Identifying Compounds in Benzoic Acid-Methanol Conversion

    Thank you for the quick replies, I heard that if you used ethanol instead that some of the ethanol ends up in the ether layer so I thought the same would have happened with the methanol.
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