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aleksley [76]
3 years ago
12

Place the following into scientific notation...(.000635) *

Physics
1 answer:
AleksAgata [21]3 years ago
6 0
6.35x10^-4 OR 6.3x10-4 (if only one decimal number is allowed)
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A disk 7.90 cm in radius rotates at a constant rate of 1 190 rev/min about its central axis. (a) Determine its angular speed. 12
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Answer:

124.62\ \text{rad/s}

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The angular speed is 124.62\ \text{rad/s}

r = 2.98 cm

Tangential speed is given by

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Tangential speed at the required point is 3.71\ \text{m/s}

Radial acceleration is given by

a=\omega^2r\\\Rightarrow a=124.62^2\times 7.9\times 10^{-2}\\\Rightarrow a=1226.88\approx 1.23\ \text{km/s}^2

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The total distance a point on the rim moves in the required time is 20.28\ \text{m}.

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