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tresset_1 [31]
3 years ago
9

What is the main optical element of a refracting telescope?

Physics
1 answer:
antoniya [11.8K]3 years ago
7 0
The large lens at the top of the telescope tube is the main optical element of a refracting telescope
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What is true about the inertia of two cars , car A of mass 1,500 kilograms and car B of mass 2,000 kilograms?
Elena-2011 [213]
Car B mass 2,000 kilograms
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3 years ago
Consider the possible scenarios and determine which of them are true for positive feedbacks or negative feedbacks.A. Increased p
avanturin [10]

Answer:

Scenario A, B and E is True.

Explanation:

Scenario A) True. Removing carbon dioxide from atmosphere decreases greenhouse effect of atmosphere. Thus, temperature rise decreases.

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Scenario C) False. Removing carbon dioxide from atmosphere decreases greenhouse effect of atmosphere. Thus, temperature rise decreases.

Scenario D) False. The more evaporation creates the more greenhouse effect. Therefore, temperature rise increases.

Scenario E) True. If reflected radiation increases from Earth, temperature rise of the Earth will decrease. Ice cover increases reflectivity which leads temperature level decrease.

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Suppose you monitor a large number (many thousands) of stars over a period of 3 years, searching for planets through the transit
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Answer:

2. You must be able to precisely measure variations in the star's brightness with time.

5. As seen from Earth, the planet's orbit must be seen nearly edge–on (in the plane of our line-of-sight).

6. You must repeatedly obtain spectra of the star that the planet orbits.

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The transit method is a very important and effective tool for discovering new exoplanets (the planets orbiting other stars out of the solar system). In this method the stars are observed for a long duration. When the exoplanet will cross in front of theses stars as seen from Earth, the brightness of the star will dip. To observe this dip following conditions must be met:

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4. Also, the orbital period should be less than the period of observation for the transit to occur at least once.

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6- A metal block measures 10 cm x 2 cm x 2 cm. what is its volume? how many blocks each
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You need 5 blocks of the smaller object to contain the same amount of volume of the bigger object

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