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  1. ... the mass is on each side and cancels out. The speed is the same for a puck or a railroad engine.

    3 Answers · Science & Mathematics · 11/12/2018

  2. f’ = observed frequency f = source frequency v = speed of sound vₛ = source’s speed= 72 km/h = 20m/s v₀ = observer’s speed = 32km...

    3 Answers · Science & Mathematics · 17/09/2019

  3. The speed is not needed for the total energy required if any gain in kinetic energy at the beginning is used in permitting the elevator to coast to a stop. E = mgh = ( 700+600)*10 * 9 = 117 kJ approximately.

    2 Answers · Science & Mathematics · 15/08/2019

  4. ... v = 15.3 m/s t = 7.10 s and arrange the equation for the unknown u: 0.5*(u+v)*t = s (u + v)t = 2s (u + v) = (2s)/t u... in the question.) Therefore the antelope's initial speed was 4.14 m/s to 3sf.

    1 Answers · Science & Mathematics · 28/01/2019

  5. ...motion and we can use the standard formula: max. speed = ω * amplitude We don’t need the wave speed (14m/s) as we told frequency and ω = 2πf. Hence: max. speed = 2πf * amplitude For wave A, max. particle speed = 2π(7) * 0.50 = 22.0m/s For wave B...

    1 Answers · Science & Mathematics · 01/05/2019

  6. Since the baseball player is moving at a constant speed, the friction force is equal to the centripetal force. To solve this problem, I will need to determine the exact number for the centripetal force. This is good way to check your answer. ...

    3 Answers · Science & Mathematics · 02/02/2019

  7. ... be reachable by the bullet. Let's say the bullet is in the air for time "t." If the bullet is just able to reach the car, impact...

    2 Answers · Science & Mathematics · 10/07/2019

  8. ...definitely spin a rock at 10% faster speed without needing a longer rope. Maybe we are...39;ve been stated in the question. For speed Fcp = mv^2 / r If you want that to...

    1 Answers · Science & Mathematics · 11/02/2019

  9. ...) is maximum (max value = ωA when x=0). ω is a constant so for half max. speed we need √(A² - x²) = A/2 A² - x² = A²/4 ...

    2 Answers · Science & Mathematics · 27/02/2019

  10. Now find the time time for first nut to fall to the ground. 12=1/2 g t^2. Time to fall...nut cover the distance. s=vo(t-t1) +1/2 g(t-t1)^2= 1/2 g t^2 Now solve for v0, the initial velocity of the second nut.

    1 Answers · Science & Mathematics · 12/09/2019

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