Tension = Mass * Gravity
Tension = 15 * 9.81 = 147.15
Answer:
Option B: Increase the voltage, while keeping the resistance constant.
Explanation:
Current is directly proportional to voltage, but indirectly proportional to resistance.
Answer:
Secretttttttttttttttttttt
To solve the problem it is necessary to use the concepts of Orbital Speed considering its density, and its angular displacement.
In general terms the Orbital speed is described as,

PART A) If the orbital speed of a star in this galaxy is constant at any radius, then,




PART B) This time we have
, where
is the angular velocity (constant at this case)




PART C) If the total mass interior to any radius r is a constant,




Answers all in picture below
: