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About kingwinner

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  • Birthday September 15
  1. I am writing an essay for a course regarding the history and philosophy of science. The topic is: "During the 17th century, there was intense interaction between science and religion. Using examples, mount an argument that takes a position on this interaction. In other words, with reference to some hisotrical examples, discuss whether you regard this relationship as positive, negative, or a combination of both." What I get from this is that the examples must be from the 17th century. I am only aware of Galileo's trial, the conflict with the church of whether the Earth is stationary or mo
  2. According to my readings, I would match Galileo with refracting telescope, law of falling bodies, projectile motion, features on the moon, sunspots, Jupiter's Moons (but I can't find any of these on the right side), but I am not aware of his contributions to either centripetal or centrifugal force...did Galileo do any work on it?
  3. This is a practice exam question on a course relating to the history of science that I am trying out in order to prepare for my exam, but I am kind of stuck on this question. I hope somebody can help me out! [Total marks: 7x2=14] I would match: Leibniz with calculus (or Newton? I am not too sure whether each person can be matched to multiple answers...but the total marks for this entire question is 7x2=14 so maybe not...but how can I pick only one of them?) Newton with reflecting telescope Leeuwenhoek with protozoa Halley with comet Galileo? I have no idea which should be matc
  4. I am pretty sure that b is false as well... But does anyone know whether c is true or false? Thanks!
  5. I will be writing my final exam tomorrow evening, and I am currently stuck on the following practice problem. It would be very nice if someone could help me out and I will remain eternally grateful for your help! 1) (Multiple Choice) Which of the following statement(s) about Cold Dark Matter (CDM) is (are) incorrect: a) CDM particles travel at a speed much lower than c :phones: neutrinos are a candidate for CDM c) simulation models using CDM produce smaller scale structures than those using Hot Dark Matter d) CDM is likely baryonic e) CDM particles should be more massive than HOT Dark Matter
  6. In general, which of the gases, N2, CO, and H2, would you expect to behave the most and least ideally? I have no idea how to determine this...can someone help me? Thank you!
  7. 1) [The main issue for me here is that I am not sure where the collision will occur. If Odie drops the birdbath right before Garfield touches the it, would the collision occur BELOW 1.5m above the ground? (because the birdbath will be moving AWAY from Garfield? Or will it still occur at exactly 1.5m above the ground as if no dropping of the birdbaths occurs?] 2) [i don't quite understand the situtation here (seems complicated). When Snoppy starts moving, will Charlie Brown also be moving? When will Snoppy come to rest? And is it a momentarily rest or will it stay at rest? At that ins
  8. for q1a, I think we should assume the second charge is the charge on the right side(+3.8x10^-6C, but I still don't get the answer. This set of questions is making me crazy...
  9. I know you physictists can calculate these very quickly. :shrug: Could somebody help me with 1 or 2 questions? I still can't get the answers in the book! Thanks!
  10. 4) 2 charges of +4.0x10^-6 C and +8.0x10^-6 C are placed 2.0m apart. What is the field strength halfway between them? [i got an answer of 3.6x10^4N/C toward the 4.0x10^-6C charge, but the answer given is 3.6x10^-4N/C toward the larger charge] 5) A point charge of 2.0x10^-6C experiences an electric force of 7.5N to the left. What force would be exerted on a -4.9x10^-5 C charge placed at the same spot? [My answer is 1.8x10^2N , but the answer given is 1.5x10^5N/C ] 6) [i got 3.2x10^5N/C [right], but the answer in the book is 1.8x10^5N/C ]
  11. For the folloing 6 questions, I got completely different (way off) answers from the ones given in the textbook. This is really driving my crazy. I checked my work many times but can't find out what I did wrong. If anyone is interested in physics problems and have the time, I hope you can help me check out whether the answers in the textbook are correct or not, so that I can know if I am correct. I really appreciate for your help! :shrug: I am wondering if I am calculating something seriously wrong so that I am getting way off answers for all these questions. I am afraid and frustrated now
  12. 1) For a positively charged sphere, the electric field lines point outward. For a negatively charged sphere, the electric field lines point inward. Why is it always like that? 2) A charge (3.6x10^-6 C) is 30cm to the left of another charge (-2.7x10^-6 C). Point A is 20cm to the right of the charge with -2.7x10^-6. a) Find the magnitude and direction of the net electric field at point A. :lol: What electric force is exerted on a charge 4.5x10^-6 C placed at point A? c) What electric force is exerted on a charge -4.5x10^-6 C placed at point A? [For part a, I got an answer of 4.8x10^5 N/C Fo
  13. Hi, 1) How do you know that exactly half of the charge is removed? How can this be justified mathematically?
  14. 1) Two charged spheres, 10.0 cm apart, attract each other with a force of magnitude 3.0x10^-6 N. What force results if an uncharged, identical sphere is touched to one of the spheres and is then taken far away? 2) What is static electricity? Why and in what way is static electricity "static"? Must electrostatic forces be repulsive? Can electrostatic forces ever be attractive? Thanks for replying!
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