law

  1. W

    Newtons Third Law

    I feel like this should be easy, but I have managed to confuse myself. Please help! Five spheres, each of mass m are joined together by four in-extensible strings. The spheres hang in a vertical line as shown in the diagram and are held at rest by a force applied to the uppermost sphere, of...
  2. W

    Newtons Third Law

    in each illustrated case, the contact between the blocks and the surfaces are rough (except where indicated) The blocks are at rest and the strings are taut. Find the tension in the string and the frictional force exerted by each surface on the block with which it is in contact. I need help with...
  3. Boss

    Cosines law, 2x

    Looking for solutions of these two
  4. noface0711

    Boolean Associative Law

    I have a couple of questions about Boolean. I have to identity which law is being used. I have to pick which one off a numbered list. I don't know if this list is numbered the same everywhere, so I've posted it HERE. Below is an example of associative law #12, correct? And I'm not as sure...
  5. W

    pre-calc law of sine help

    Today we learned that if h<a<b than there is a possible of two triangles, what do I do now after I do the original problem and I know that h<a<b?
  6. A

    Linear law to non linear functions

    Hello everyone Need some help on this question: Question 1 Following data is obtained from an experiment, x & y are related by y = ab^x The values are x 1 2 3 4 y 28 200 1590 7950 a) Explain how a straight line may be plotted. Answer given in the book is log y=(log b)x + log 9 My...
  7. S

    Transitive law in proving p → q ≡ ~q → ~p by deductive reasoning.

    It's written in my book that in the solution of the example , the p → q ≡ ~q → ~p is proven by the Transitive Law. But nowhere in the solution can I find transitive law being used. What I know from the book is that by transitive Law (Trans.), (p→q)∧(q→r) ⇒ (p→r). Commutative law or p→q ≡...
  8. R

    help interpreting the sum law of limit

    if lim f(x)+ g(x) = lim f(x) + lim g(x), can i prove limit DNE by proving either lim f(x) or lim g(x) DNE ? thx
  9. J

    Newton's Law of Cooling Problem

    At 1 p.m. a thermometer reading 80F is taken outside where the temperature is constant. At 1:05 p.pm. the thermometer reads 35F more than the surrounding temperature. Forty minutes after being taken outside the thermometer reading differs fromt he outside temperature by 15F. Determine the...
  10. S

    What is the proper method in using the Distributive Law with AND and OR

    I am a bit confused with how to do the distributive law with logic statements. I am presented with this equation: [(p\vee q) \vee (q \vee (\urcorner r) ) \wedge (p \vee q)] And the book says the first step of finding it logical equivalency is to use the Distributive Law, which should get...
  11. C

    Law of Cosines problem

    I'm trying to find angle B using the law of cosines. I'm not sure where my mistake lies. I'm guessing somewhere in my order of operations, but I'm not 100% sure. The given sides and angle are as follows: (b=78ft; c=85ft; A=72°). I found side "a" to be 95.97 ft (the textbook answer key rounds to...
  12. J

    Help with vector calculus and Gauss's Law for a point charge

    Let u be the vector field u = Qx/(4πϵr3) in three dimensions, where x is theposition vector, r = |x|, and Q and ϵ are constants. Show that∫Su · n dS = Q/ϵ ,where S is a sphere of radius a centred on the origin, and n is a unit normal vectorpointing radially outwards from the sphere. I guess...
  13. F

    law of cosine problem

    Hi everyone, I just joined the forums and was wondering if i could get some help with a math problem on my homework assignment, I just can't seem to figure it out it goes like this In ΔABC, suppose that a4 + b4 + c4 = 2(a2 + b2)c2. Find ∠C. (There are two answers. Enter your answers as a...
  14. G

    Software to Compute Parallelogram Law Summations

    Hi all. I am looking for a software that can compute Parallelogram Law summations the way I have shown in the image below. Can any one make some recommendations or help me point to a free tool online that makes these summations. The reason I am asking for this is because the orbits determined...
  15. R

    Which of the following problem types can always be solved using the law of cosines...

    Which of the following problem types can always be solved using the law of cosines or sines? Check all that apply. Please explain answers. Thank you!
  16. P

    Newtons Law of cooling problem

    I'm having trouble finding the fuctions for this problem I keep messing up the constant can anyone help me out? A fast food restaurant wants a special container to hold coffee. The restaurant wishes the container to quickly cool the coffee from 200 to 130 F and keep the liquid between 110 and...
  17. R

    In order to apply the law of cosines to find the measure of an interior angle...

    In order to apply the law of cosines to find the measure of an interior angle, it is enough to know which of the following? A. The area of the triangle B. The length of all three sides of a triangle C. At least two of the angles of a triangle and the length of one of its sides Please...
  18. J

    Zipf's Law for Random Texts

    we let there be M letters and one space that our random monkey can type, each with probability A word is formed when a string of letters of any size is preceded and followed by a space, denoted by _ here. The probability of getting the word _a_ is p3, and that of an L-letter word, pL+2 . So...
  19. A

    Law of Cosines Word Problem

    Can anyone help me to answer this one..Two ships leave the same port at the same time, One ships sails on a course of 125 degree at 18 knots while the other sails on a course of 230 degree at 24 knots.Find after 3 hours (a) the distance between a ship and (b) the bearing from the first ship to...
  20. D

    Demorgan's Law question: Converting from truth table to DNF and converting it.

    So I have an assignment question that I'm stuck on. I'm given the following truth table. a b c P T T T F T T F F T F T T T F F F F T T T F T F F F F T T F F F F a) I'm asked to find the DNF of this. I think I got it. (a or not b or c) and (not a or b or c) and (not a or not b or c) Basically...