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  1. Welcome to Yahoo!Answers. Let's call the time for the rock to fall "t"; then the time for the sound to return from the bottom of...

    3 Answers · Science & Mathematics · 14/09/2019

  2. This is just a straightforward kinematics problem.  You just need to take care with the units.  I use the suvat symbols. s = displacement...

    2 Answers · Science & Mathematics · 25/09/2019

  3. ... running the second the baseball was hit. Speed d ÷ = 69.7 ÷ *([(-√568.792 – 14 * √3)] ÷ 9.8 This is approximately 14.3 seconds. I hope this is helpful for you.  

    3 Answers · Science & Mathematics · 25/06/2019

  4. ... very far apart. Assume they both have the same speed v, and are moving toward each other. Then...kinetic energy = 1/2 mv^2 + 1/2m v^2 = mv^2 --> solve for v v = sqrt(U/m) = sqrt(k*q1*q2/(m*d)) = 658.6 m/s...

    1 Answers · Science & Mathematics · 23/05/2019

  5. ...behave that way, the path lengths will vary according to the orbital. you need to define a unit distance for a root-mean square "revolution" and divide the speed of light by that value to get the average rpm. It is not obvious to ...

    3 Answers · Science & Mathematics · 18/09/2019

  6. ... for t and then double it (up then down). I'll leave that for you if you're interested. iii) Now I think we WILL need to find the maximum height. H = h0 + v² / 2g = 3m + (25m/s)² / 19...

    3 Answers · Science & Mathematics · 08/02/2020

  7. No one is answering 8 questions for 10 points, maybe list each question individually. The solution to number 1 is in the Comment section

    3 Answers · Science & Mathematics · 03/09/2019

  8. ...in what you know and find the remaining value. For 2 how I do it is that both objects...and they must both reflect off it with their relative speeds unaltered. The earth and the speed in the earth frame...

    1 Answers · Science & Mathematics · 29/06/2019

  9. ...h*f = hc/wl where f = frequency, wl = wavelength of photon, c = speed of light and h = unknown Planck constant. Now...  where W = work function of Cesium For wl = wl2 = 200nm, the electron has 4.11 eV of...

    1 Answers · Science & Mathematics · 06/02/2020

  10. d = (1/2)(a)(t^2) = 10.80 = (1/2)(9.81)(t^2). Time to hit the ground, t = 1.48 s. Horizontally, d = vt. v = d / t = 3.9 / 1.48 = 2.63 m/s.

    1 Answers · Science & Mathematics · 26/01/2020

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