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Natali [406]
3 years ago
9

A bird flies 2km to the south, then 0.2km to the north.What is the displacement of the bird ?

Physics
2 answers:
Lunna [17]3 years ago
6 0

Explanation:

It is given that,

A bird flies 2 km to the south, then 0.2 km to the north. The displacement of the bird is equal to the shortest path covered by it.

Initially, the bird is moving in south direction and then it move to north. Displacement can be calculated using difference between initial position and final position.

d = 2.2 km - 0.2 km = 1.8 km

Hence, the displacement of the bird is 1.8 km

vivado [14]3 years ago
3 0
It would be D because it is flying back to where it started 2-.2=1.8
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Answer

Given,

Sirius A surface temperature,T = 9400 K

Sirius A luminosity,L = 26 L₀

L₀ is the luminosity of sun.

Radius of sun =  695700000 m

Temperature on sun surface = 5780 K

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}}

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Two objects, one having twice the mass of the other, are initially at rest. Two forces, one twice as big as the other, act on th
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<em><u>Note: There is no image to take as a reference, so I'm assuming F2 directed to the right and F1 to the left, and F2=2F1</u></em>

Answer:

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<em>to the right</em>

Explanation:

<u>Net Force</u>

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Two forces F1=F and F2 act individually on each object in opposite directions and

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