Author Question: For the final sum of 544.36 + 455.64, the number of significant figures is ________. A) 6 B) 5 ... (Read 140 times)

EY67 · **on:** Aug 27, 2018

For the final sum of 544.36 + 455.64, the number of significant figures is ________.

A) 6
B) 5
C) 4
D) 2
E) 1

Question 2

Why would you expect alpha particles to be less able to penetrate materials than beta particles of the same kinetic energy?

A) Alpha particles pick up electrons to become harmless helium atoms.
B) Alpha particles carry twice the electric charge.
C) Alpha particles move much slower for a given kinetic energy.
D) Two of the above answers are reasonable.