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  1. I so wanted to answer this question. However, my answer is "Anonymous" as your post is Anonymous. There is no need for an Anonymous question in this category,

    1 Answers · Science & Mathematics · 22/11/2020

  2.    First up... don't forget to choose a  BEST  answer... !! speed , that is tangential velocity,  v,   is  :          v =  ( 2πr ) * ( # rev )  /  t All the objects have the  same  value for   2πr,  just convert   r  to meters instead of cm before  any calculations...

    1 Answers · Science & Mathematics · 09/11/2020

  3. ...39;d say velocity, because it is squared. But one could argue for radius, because it's in the denominator (and so small radii lead to big ...

    1 Answers · Science & Mathematics · 10/11/2020

  4. The cooled atoms have nothing to do with the answer. If you've calculated photons per second (and remember that µW = µJ/s), then you're done. photons/s = power (J/s) / energy per photon (J...

    1 Answers · Science & Mathematics · 06/11/2020

  5. mg tanθ = mv²/r v²= r/m * mg tanθ, but mass cancels v = √(rg tanθ) v = √140*9.80665 * 0.3249 = 21.1m/s  ((76.0 kph)) Your answer is correct except for missing units.

    2 Answers · Science & Mathematics · 31/10/2020

  6. ...vertical component = 26sin22 = 9.7 m/s (b) time, t = horizontal distance / horizontal component of speed = 27.4/24 = 1.1 s (c) ball's height, s = ut+½gt² ...where u...

    1 Answers · Science & Mathematics · 27/10/2020

  7. ... 2. f = 3e8m/s / 550e-9m = 5.45e14 Hz (or s^-1) 3. Doppler for stationary source: f = f₀ * (c+v)/c 5.45 = 4.62*(3e8 + v) / 3e8 ignoring...

    1 Answers · Science & Mathematics · 27/10/2020

  8. ...anything with a fist or whatever. Same problem. Yes, your body would need food and water at an accelerated rate... but ***not from your perspective...

    3 Answers · Science & Mathematics · 26/10/2020

  9. ...      τ = torque in N•m   τ = αI torque required for that accel.   P = τω power to hold that speed with τ friction   θ = θ₀ + ω₀t + ½αt²...

    1 Answers · Science & Mathematics · 26/10/2020

  10. ...½*0.906rev/s²*(0.193s)² = 0.0748 revs C. For speeds , we need to convert the angular velocities to rads: v_t = 0.475*2π rad/s...

    2 Answers · Science & Mathematics · 31/10/2020

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