Matthew pulls his little sister Sarah in a sled on an icy surface (assume no friction), with a force ...

Matthew pulls his little sister Sarah in a sled on an icy surface (assume no friction), with a force of 60.0 Newtons at an angle of 37.0 upward from the horizontal. If he pulls her a distance of 12.0 m, the work he does is
 
  A) 0.333 kJ
  B) 720 J
  C) 575 J
  D) 433 J
  E) 185 J

Question 2

Stars much less luminous than the Sun have
 
  A) wider habitable zones, increasing the odds of finding habitable planets and much longer lifetimes allowing life to appear and evolve
  B) wider habitable zones, increasing the odds of finding habitable planets but lifetimes too short for life to appear
  C) narrower habitable zones, decreasing the odds of finding habitable planets and lifetimes too short for life to appear
  D) narrower habitable zones, decreasing the odds of finding habitable planets but much longer lifetimes allowing life to appear and evolve

Question 3

The condition of driving a system at a natural frequency is referred to as resonance.
 
  Indicate whether the statement is true or false