The cosmological principle is the ultimate extension of the Copernican principle to the entire universe, in that there is no center at all

Indicate whether the statement is true or false


TRUE

Physics & Space Science

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A cylindrical wire has a resistance R and resistivity ?. If its length and diameter are BOTH cut in half,

(a) what will be its resistance? A) 4R B) 2R C) R D) R/2 E) R/4 (b) what will be its resistivity? A) 4? B) 2? C) ? D) ?/2 E) ?/4 What will be an ideal response?

Physics & Space Science

A fighter plane moving 200 m/s fires a projectile with speed 50 m/s in a forward direction. The projectile makes an angle of 30° with the direction of the plane's motion

What is the speed of the projectile with respect to a stationary observer on the ground? A) 293 m/s B) 243 m/s C) 268 m/s D) 250 m/s E) 281 m/s

Physics & Space Science

The celestial sphere is divided into 88 modern constellations

Indicate whether the statement is true or false

Physics & Space Science

An electric device delivers a current of 5.0 A for 10 seconds. How many electrons flow through this device?

A) 0.20 B) 20 C) 2.0 D) 3.1 × 1020 E) 31 × 1020

Physics & Space Science