XI. Modern Physics

1.

a) On the atomic level, energy is emitted or absorbed in discrete packets called _____.

 

b) The energy of a photon is proportional to its _____.

 a)

b)

 

2. On the atomic level, energy and matter exhibit the characteristics of both _____ and particles.

 

 2.

Atomic particles are composed of subnuclear particles.

3. Protons and neutrons are made up of smaller particles called ____.

4. Each elementary particle has a corresponding ____. (opposite charge)

 3.

4.

5. The fundamental source of all energy in the universe is the conversion of ____ into energy.

 

  

 

5.

 

 

Modern Physics

6. Two examples of Baryons
 

7.  Baryons are made of ______  quarks

  

6.

7.

 

8. ________  - no charge and less mass than an electron (travel close to the speed of _____ )

 

 a)

b)


9. What is the charge on a up, up, down baryon (uud)?
(see reference)

 

10. Which combination of quarks could produce a neutral baryon? (1) cdt  (2) cts (3) cdb (4) cdu

 

11. Find the charge on each baryon:

(a) udd (b) —u—ud (c) —udd 

  

9.

10.
 

11.

a)   b)

c)