Recent content by marcuss

  1. M

    Differentiating with respect to t implicitly

    a particle moves along the curve xy=10, x=2 and dy/dt=3, what is the value of dx/dt? i tried product rule and got x*y*dy/dt + y*x*dx/dt = 0 and the answer that i get doesn't appear on the multiple choice answers a)-5/2 b)-6/5 c) 0 d) 4/5 e) 6/5 i don't know what I am...
  2. M

    Finding zero of function problem

    Homework Statement the function f(x)=tan(3^x) has one zero in the interval [0,1.4]. The derivative at this point is The Attempt at a Solution f'(x)= sec^2(3^x)*x3^(x-1) and i really can't seem to get a zero from that because i really don't know where to start and if I am...
  3. M

    pH calculations for titration of NaOH with HCl

    Chemistry pH problem help please NaOH and HCl Calculate the pH after the following total volumes of .32M HCl have been added to 25 mL of 0.16M NaOH a. 0 mL c. 12.4 mL e. 12.6 mL b. 1 mL d. 12.5 mL f. 15.0 mL A. i have answered correctly but i...
  4. M

    Linear speed and radial acceleration of 12.7mm drill bit at 1250 rev/min

    Drill problem, linear speed of drill bit help please [b]1. For a 12.7mm diameter drill bit turning at a constant 1250 rev/min find a) the maximum linear speed of any part of the bit; b) the maximum radial acceleration of any part of the bit [b]2. i switched the revs per minutes into...
  5. M

    Why does the heavier sled have momentum √2 times the lighter sled?

    their kinetic energies were the same at the finish line
  6. M

    Why does the heavier sled have momentum √2 times the lighter sled?

    [b]1. The one sled has a mass of 2m and the other sled has a mass of m show that sled one with mass 2m has a momentum of root2 compared to the sled with mass m. The only formulas that i could think to use were p=mv and sigmaF=dp/dt and i can't seem to find a way to relate them to get an...
  7. M

    What base makes 121 equal to decimal 324?

    many thanks to both of u
  8. M

    What base makes 121 equal to decimal 324?

    Base of the system problems, please help What is the base of the system in which 121 represents the same number as the decimal number 324? [b] I need someone to tell what this thing is saying thank you.
  9. M

    How Do You Calculate the Higher Temperature in a Chemical Kinetics Problem?

    [b]1. A certain reaction has an activation energy of 54.0 kJ/mol. As the temperature is increased from 22degrees celsius to a higher temperature, the rate constant increases by a factor of 7.00. Calculate the higher temperature. [b]2. ln(k)=-Ea/RT + ln(A) [b]3. i don't think that i...
  10. M

    Proving cos2A/(1+sin2A) = (cotA-1)/(cotA+1)

    did u use the double angle formulas of sin2u=2sinucosu and cos2u=1-2sin^2u?
  11. M

    Power expansion for x/((1-x)(1-x^2))

    did u try F.O.I.L?(first outer inner last) i believe that is all it is asking
  12. M

    Finding reaction order and half-life from initial rate data

    Need Help!-Chemistry kinetics [b]1. Consider the following initial rate data for the decomposition of compound AB to give A and B: [AB]o(mol/L) Initial Rate(mol/L*s) .200 3.20*10^-3 .400 1.28*10^-2 .600...
See more