Author: Study Clue

If A and B are finite with |A|=7, |B|=5 and |A∩B|=3, then |A∪B| is A 10 B 11 C 9

For finite sets A and B, the correct counting formula for |A ∪ B| is A |A|+|B| B |A|+|B|−|A∩B| only

If A={1,2,3} and B={2,3,4}, then A Δ B equals A {2,3} B { } C {1,2,3,4} D {1,4} Explanation Symmetric

In set-builder form, the set of even natural numbers is A {2,4,6,…} B {x|x even} C {1,3,5,…} D {x|x prime}

A set is usually written as a collection of A Ordered pairs only B Random statements C Well-defined objects D

Two nuclei have radii ratio R2/R1=2R2/R1=2. What is A2/A1A2/A1? A C. 8 B A. 2 C B. 4 D D.

A nucleus has radius 4.8 fm. What is the approximate mass number A? A 64 B 27 C 125 D

A nucleus has mass defect 0.02 u. What is its binding energy roughly? A 18.6 MeV B 0.02 MeV C

Which quantity mainly explains nearly constant nuclear density across nuclei? A Electron cloud B Nuclear forces C Coulomb force D

What mainly determines an approximate nuclear radius? A Number of neutrons B Atomic number Z C Mass number A D