A 1.0-mm diameter extension cord is made of metal having a resistivity of 1.68 × 10-8 ? ? m. When it carries a current of 15 A, what is the potential difference between two points in the cord that are 100 m apart?
A) 12 V
B) 23 V
C) 32 V
D) 41 V
C
Physics & Space Science
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The halo in the spherical component of the Milky Way contains about _____ as many stars as the disk of the galaxy
A) 2 percent B) 6 percent C) 10 percent D) 14 percent
Physics & Space Science
Does the universe look the same in the directions of the HDFN and HDFN (fractions of galaxy types statistically similar)?
A: Yes. B: No.
Physics & Space Science
A 5-g coin is dropped from a 300-m building. If it reaches a terminal velocity of 45 m/s, and the rest of the energy is converted to heating the coin, what is the change in temperature (in °C) of the coin? (The specific heat of copper is 387 J/kg?°C.)
A. 9 B. 2 C. 5 D. 21 E. 0.5
Physics & Space Science
All four jovian planets are oblate, with larger polar than equatorial diameters
Indicate whether the statement is true or false
Physics & Space Science