Why is the strange quark strange?

A.) It is more massive than any other kind of quark.
B.) It is less massive than any other kind of quark.
C.) It is blue.
D.) It lives longer than we would expect.
E.) It is charmed.


Answer: D.) It lives longer than we would expect.

Physics & Space Science

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One light year is about 10 trillion kilometers

Indicate whether the statement is true or false

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Discuss advantages and disadvantages of using a large control volume.

What will be an ideal response?

Physics & Space Science

It currently appears that within this universe we have mostly

A) neutrinos.
B) matter.
C) dark matter.
D) dark energy.

Physics & Space Science

In Jules Verne's From the Earth to the Moon, scientists are launched from the surface of Earth by a cannon

With what speed would their capsule have to leave the cannon if the speed of the capsule is required to be zero m/s at the point between Earth and the Moon where their gravitational pulls on the capsule are equal? The mass of Earth is 5.97 × 1024 kg, the mass of the Moon is 7.35 × 1022 kg, the distance between Earth and the Moon is 3.84 × 108 m, the radius of Earth is 6.37 × 106 m, and G = 6.67 x 10-11 N•m2/kg2. A) 11,100 m/s B) 11,200 m/s C) 10,400 m/s D) 15,700 m/s E) 15,800 m/s

Physics & Space Science