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... 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

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

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

... 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

...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

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

... 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

...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

...) 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

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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