If a circle has a radius of 1.109 m, what is its area expressed to the correct number of significant figures?
A) 3.86 m2
B) 3.863 m2
C) 3.864 m2
D) 3.8638 m2
E) 3.86379 m2
Question 2
Which one has larger kinetic energy: a 500-kg object moving at 40 m/s or a 1000-kg object moving at 20 m/s?
A) The 500-kg object
B) The 1000-kg object
C) Both have the same kinetic energy.