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What are the stars, What are The Stars? The star is made of dust and ga...

What are The Stars? The star is made of dust and gas in space. Essentially it has many stages they are 1.black hole 2.nuetron star 3.supernova 4.red giant stage

Speed of Traing, How fast would the train be travelling when it in Lac-Méga...

How fast would the train be travelling when it in Lac-Mégantic derailed. There were 5 locomotives and 72 cars filled with 113,000 litres of crude oil. The elevation was 520 m Cote

Universal gravitation, Object A attracts object B with a gravatational forc...

Object A attracts object B with a gravatational force of 10 newtons from a given distance. If the distance between the two objects is doubled, what is the changed force of attracti

Laser, construction and working of ruby laser

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De broglies wavelength-nature of light, An electron is in a box of width 3*...

An electron is in a box of width 3*10^-10m.what are de broglies wavelength and magnitude of momentum of the electron if it is in A)n=1 level B)n=2 level C)n=3 level Ans)  Use the

Determine the change in temperature of water, What is the change in tempera...

What is the change in temperature of water after falling over a 50.0-m-tall waterfall? Suppose that the water is at rest just before falling off and just after it reaches the b

What is fluorescence, Q. What is fluorescence? When an atomic or else m...

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