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kirill [66]
3 years ago
15

Buna!! ne pune le fizica intrebari despre legarea mixta!! Va rog , ma puteti ajuta ?? Ptr raspunsuri bune dau coroana!!!!!!

Physics
1 answer:
Iteru [2.4K]3 years ago
4 0
<span>Un solid covalent de rețea constă din atomi reținuți împreună de o rețea de legături covalente (perechi de electroni împărțite între atomi de electronegativitate similară) și, prin urmare, pot fi considerați o singură moleculă mare.     </span>
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A swinging pendulum has a total energy of <img src="https://tex.z-dn.net/?f=E_i" id="TexFormula1" title="E_i" alt="E_i" align="a
Zolol [24]

Answer:

\frac{E_{2}}{E_{1}} \approx 1 -\frac{3\theta}{1-\theta} (for small oscillations)

Explanation:

The total energy of the pendulum is equal to:

E_{1} = m\cdot g \cdot (1-\cos \theta)\cdot L

For small oscillations, the equation can be re-arranged into the following form:

E_{1} \approx m\cdot g \cdot (1-\theta) \cdot L

Where:

\theta = \frac{A}{L^{2}}, measured in radians.

If the amplitude of pendulum oscillations is increase by a factor of 4, the angle of oscillation is 4\theta and the total energy of the pendulum is:

E_{2} \approx m\cdot g \cdot (1-4\theta)\cdot L

The factor of change is:

\frac{E_{2}}{E_{1}} \approx \frac{1 - 4\theta}{1-\theta}

\frac{E_{2}}{E_{1}} \approx 1 -\frac{3\theta}{1-\theta}

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