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ioda
3 years ago
7

An element's atomic number is 58. How many protons would an atom of this element have?

Physics
1 answer:
agasfer [191]3 years ago
4 0
58 the number of protons are the same as your atomic number<span />
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7. A toy car of mass 1.2 kg is driving vertical circles inside a hollow cylinder of radius 2.0m. It is moving at a constant spee
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N_{top}=9.8N\\N_{bottom}=33.4N

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-m\frac{v^2}{R}=-N_{top}-mg\\m\frac{v^2}{R}=N_{bottom}-mg

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N_{top}=m\frac{v^2}{R}-mg=(1.2kg)\frac{(6m/s)^2}{2m}-(1.2kg)(9.8m/s^2)=9.8N\\N_{bottom}=m\frac{v^2}{R}+mg=(1.2kg)\frac{(6m/s)^2}{2m}+(1.2kg)(9.8m/s^2)=33.4N

The limit for falling off would be N_{top}=0, so the minimum speed would be:

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3 0
3 years ago
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