What is the definition of luminosity

Answers

Answer 1
Answer: Luminosity is the total amount of energy emitted by a star, galaxy, or other astronomical object per unit time.
Answer 2
Answer: The intrinsic brightness of a celestial object or the rate of emission of radiation, visible or otherwise.

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A piece of metal and a piece of brick are both sitting in the sun if both are the same mass what property of matter will make the metal feel hotter to touch

Answers

Metals are highly conductive both electrically and thermally because of its highly ordered crystalline structure of metallic particles. Brick is poor conductor and will be less hot than metal.

What is conduction?

Conduction is the mechanism of heat transfer in solids. Solids are composed of closely packed particles arranged in a chain with strong intermolecular forces.

Metals are highly conductive. They have free electrons which are delocalized  in the crystal lattice. They can be easily transited through and make the material conductive.

Bricks is poor conductor of heat and odes not conduct electrically, it easily melts at high temperatures and easily cools as well. Therefore, at the surface of sun, the highly conductive metal will be  more hotter.

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The piece of metal will feel hotter to touch because of its heat conductance. whereas the brick does not conduct heat as well as the metal. Hence the piece of metal feeling hotter to touch. 

A rock containing valuable minerals that can be mined is called A. An inorganic compound
B. An igneous rock
C. An ore
D. An organic compound

Answers

A rock containing valuable minerals that can be mined is called an ore. The correct option is C.

What is an ore?

Ore is a deposit of one or more valuable minerals present inside the Earth's crust.

Metals essential to industry and trade, such as copper, gold, and iron, are found in the most valuable ore deposits. Copper ore is mined for a number of industrialapplications.

Ore is natural rock or sediment that contains one or more valuable minerals, usually metals, and can be mined, treated, and sold for a profit.

Mining extracts ore from the Earth, which is then treated or refined, often through smelting, to extract valuable metals or minerals.

Crushing the rock is the first step in extractingore from it. Heap leaching, flotation, or smelting are methods for extracting ore from rock.

Thus, the correct option is C.

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Answers

Answer:

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Explanation:

Answer:

Yes

Explanation:

When particles move past each other with ease it is called _____.a. effusion
b. fluidity
c. density
d. compressibility

Answers

fluidity is the answer
B. its fluidity, particles of a gas move freely

What two kinds of motion are exhibited by electrons in an atom?

Answers

Two kinds of motion exhibited by electrons of an atom are electron spin and electron revolution

The loss of an organism at the bottom of a food chain negatively impacts all organisms in the chain.

Answers

It is a true fact that the loss of an organism at the bottom of a food chain negatively impacts all organisms in the chain.

Explanation:

This is because if the below organism which is constantly interchanged with plants, no herbivores would eat those plants, thus, will also die, which will also determine that the next consumers will have trifle to eat which will also happen to their deaths. So, yes. It concerns it negatively. And very negatively.

If this is a true or false question, it is True.