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3 years ago

6

The perforating canals run perpendicular to osteons. a. True b. False

1 answer:

Inga [223]3 years ago

3 0

<span> Its A. Tue:the basic functional and structural unit of mature compact bone; run parallel to the diaphysis; has a central canal, concentric lamellae, osteocytes, canaliculi, perforating canals, circumferential lamellae, and interstitial lamellae </span>

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Answer

Given,

Sirius A surface temperature,T = 9400 K

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L₀ is the luminosity of sun.

Radius of sun = 695700000 m

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Luminous intensity is given by:-

$L=4 \pi R^{2} \sigma T^{4}$

Now

$\frac{L}{L_{0}}=\frac{4 \pi R^{2} \sigma T^{4}}{4 \pi R_{0}^{2} \sigma T_{0}^{4}}=26$

$\Rightarrow \frac{R^{2} T^{4}}{R_{0}^{2} T_{0}^{4}}=26$

$\Rightarrow R^{2}=26 \times \frac{R^{2} T_{0}^{4}}{T^{4}}=26 \times \frac{695700000^{2} \times 5780^{4}}{9400^{4}}$

$R=1341246640\ m=1.34 \times 10^{9}$

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