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Natalka [10]
3 years ago
15

The brightest, hottest, an

Physics
1 answer:
dangina [55]3 years ago
6 0

The speed of the star is 255 km/s

Explanation:

The kinetic energy of a body is the energy possessed by the body due to its motion. Mathematically:

KE=\frac{1}{2}mv^2

where

m is the mass of the object

v is its speed

For the star in this problem, we have:

m=3.38\cdot 10^{31} kg is the mass

KE=1.10\cdot 10^{42} J is the kinetic energy

Therefore, the speed of the star is:

v=\sqrt{\frac{2KE}{m}}=\sqrt{\frac{2(1.10\cdot 10^{42})}{3.38\cdot 10^{31}}}=2.55\cdot 10^5 m/s

Which corresponds to 255 km/s

Learn more about kinetic energy:

brainly.com/question/6536722

#LearnwithBrainly

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If the mass of an object on Earth is 18 grams, what would the mass of the same object be on the Moon?
Tanya [424]

Answer:18 grams

Explanation:

The mass of an object doesn't change,it is the same everywhere irrespective of it location,therefore if the mass of an object in earth is 18 grams, the mass of the object in the moon will also be 18 grams

4 0
3 years ago
State Newton's law of gravitation.​
djyliett [7]

Explanation:

Newton’s law of gravitation, statement that any particle of matter in the universe attracts any other with a force varying directly as the product of the masses and inversely as the square of the distance between them.

Hope this helps!

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When silk is rubbed with glass what silk is transferred? ​
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Answer:

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A metal disk of radius 10 cm has a hole at a distance of 2.5 cm from the center. The size of the hole is 1 cm in diameter. If yo
Stella [2.4K]

The size of the disc will Increase

The hole will enlarge in proportion to the metal if the disc is homogeneous and isotropic (the same in all directions). This is evident because, since the hole's edge is constructed of metal, the thermal expansion equation dL=LdT holds true for all lengths related to the metal, including the circle of the hole. Additionally, if the diameter of the hole increases, so does its circumference.

The analysis becomes more challenging if your disc has distinct areas formed of various metal kinds or if the metal that makes up your disc has an anisotropic crystal structure, meaning that it expands by different amounts in different directions. But given the total change in size is still an expansion, I believe the hole would become bigger in all scenarios.

Hence ,The size of the disc will Increase

Learn more about Metal disc here :

brainly.com/question/15314981

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4 0
2 years ago
Physical properties are those which can be measured or observed without changing the __________.
schepotkina [342]

Answer:

Physical properties are those which can be measured or observed without changing the substance.

Explanation:

Physical properties are properties that can be measured or observed without changing the chemical nature of the substance. Some examples of physical properties are: color (intensive) density (intensive)

<u><em>Answer is B. Substance</em></u>

<u><em>Hope that helps</em></u>

7 0
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