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Pani-rosa [81]
2 years ago
12

How much greater is the light-collecting area of a 6-meter telescope than a 3-meter telescope?.

Physics
1 answer:
Fittoniya [83]2 years ago
8 0

Answer:

2x greater

Explanation:

3x2=6

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How can i prove the conservation of mechanical energy?​
FinnZ [79.3K]

Answer:

We can also prove the conservation of mechanical energy of a freely falling body by the work-energy theorem, which states that change in kinetic energy of a body is equal to work done on it. i.e. W=ΔK. And ΔE=ΔK+ΔU. Hence the mechanical energy of the body is conserved

Explanation:

5 0
3 years ago
Ignoring air resistance and the little friction from the plastic tube, the magnet was a freely-falling object in each trial. If
horsena [70]

Answer:

emf will also be 10 times less as compared to when it has fallen 40 \mathrm{m}

Explanation:

We know, from faraday's law-

e m f=-N \frac{\Delta \Phi}{\Delta T}

and \Phi=B . A

So, as the height increases the velocity with which it will cross the ring will also increase. (v=\sqrt{2 g h})

Given

\mathrm{V} 1(\text { Speed at } 40 \mathrm{m})=2 \mathrm{x} \mathrm{V} 2(\text { speed at } 10 \mathrm{m})

\sqrt{2 g h_{2}}=2 \times \sqrt{2 g h_{1}}=28.28 \mathrm{m} / \mathrm{s}

Now, from 40 \mathrm{cm}

V_{3}=\sqrt{2 g h_{3}}=\sqrt{2 \times 10 \times 0.4}=2.82 \mathrm{m} / \mathrm{s}

From equation a and b we see that velocity when dropped from 40 \mathrm{m} is 10 times greater when height is 40 \mathrm{cm} so, emf will also be 10 times less as compared to when it has fallen 40 \mathrm{m}

4 0
3 years ago
Without sea otters, sea urchins would overgraze on kelp beds, dramatically changing the marine community. true/false
Bumek [7]
True is the anwser to your question
 Hope this helps
5 0
3 years ago
Read 2 more answers
What is potential energy​
JulsSmile [24]

Answer:

An Energy held by an object because of its position relative by other objects

Explanation:

6 0
3 years ago
What is the exact meaning of croos section and cross sectional area of a conductor?
Sonbull [250]
The cross section is the little tiny circle you see when you cut a wire
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The cross-sectional area of the wire is the area of that little circle. 
It's equal to

                           Area = (pi) x (1/4) x (Diameter of the wire)²
4 0
3 years ago
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