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spayn [35]
3 years ago
12

Which are the components of a typical refracting telescope? hints?

Physics
1 answer:
Ivenika [448]3 years ago
4 0
<span>covex object and concave eyepiece.</span>
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A motorcycle travels 90.0 km/h. How many seconds will it take the motorcycle to cover 2.10 x 103 m?
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The time taken is 84 seconds, please give the brainliest award would be much appreciated.

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How to use heliocentric in your own sentence?
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A metal block suspended from a spring balance is submerged in water. You observe that the block displaces 55 cm3 of water and th
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Answer:

8977.7 kg/m^3

Explanation:

Volume of water displaced = 55 cm^3 = 55 x 10^-6 m^3

Reading of balance when block is immersed in water = 4.3 N

According to the Archimedes principle, when a body is immersed n a liquid partly or wholly, then there is a loss in the weight of body which is called upthrust or buoyant force. this buoyant force is equal to the weight of liquid displaced by the body.

Buoyant force = weight of the water displaced by the block

Buoyant force = Volume of water displaced x density of water x g

                        = 55 x 10^-6 x 1000 x .8 = 0.539 N

True weight of the body = Weight of body in water + buoyant force

m g = 4.3 + 0.539 = 4.839

m = 0.4937 kg

Density of block = mass of block / volume of block

= \frac{0.4937}{55\times10^{-6}}

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