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Regents Problems Best Solution

  1. Sep 28, 2008 #1
    1. The problem statement, all variables and given/known data
    Problems in pics from regents site.



    2. Relevant equations

    3. The attempt at a solution
    16 and 17--
    U = C_v 300-275 but how do i find C_v
    17 ---is zero from properties of adiabatic process.

    23 How am I supposed to know its 4 without memorizing the resistance
    i know R = rho L/a but I would have to memorize rho.

    6 ---it has to be 3 because of maximum magnitude = 7

    18 and 43----Same as 23 ---

    I use v= at + v_o to find half of time in air above horizontal from starting point
    for both balls then
    used x= 0.5 g t^2 to find the rest of the time and then figured out ratio
    but this way is very computationally intensive is there a better way.

    30-- am I supposed to know an equation for n(lambda)

    19--- same as 23

    29-- the frequency stays the same but why???
  2. jcsd
  3. Oct 2, 2008 #2
    Does anyone know why the frequency stays the same as light passes through a medium but the wavelength and speed change?
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