Physics worksheet lesson 30 standard model 1
The document is a physics worksheet that covers fundamental forces, classification of matter, and antiparticles. It begins by listing the four fundamental forces from strongest to weakest and describes their characteristics. Particles are then classified as either fermions or bosons depending on their interaction, with hadrons made of quarks and leptons being elementary particles. The document defines baryons as particles made of three quarks and mesons as particles made of a quark and antiquark. It concludes by describing positrons as having the same mass as electrons but opposite charge and neutrinos as neutral particles with little mass.
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Physics worksheet lesson 30 standard model 1
- 1. Physics Worksheet Quantum Physics Section: Name: Mr. Lin 1 1 The Fundamental Forces a. Four Fundamental Forces: There are four fundamental forces in nature. Arrange them from the strongest to the weakest. (1) _________________________________ (2) _________________________________ (3) _________________________________ (4) _________________________________ b. Among the four fundamental forces: Long-range forces: ____________________ Short-range forces: ____________________ c. ______________________________ holds the nucleon (protons and neutrons) together. d. ________________________ is responsible for the decay of some nuclear particles. e. In modern physics, particles are force carriers, because forces are brought about as a result of an ___________________________________. 2 Classification of Matter a. Particles are classified according to the ___________________________________. they have with other particles. b. If the force carrier particles (such as gluons, gravitons, etc.) are excluded, all particles can be classified into two groups ________________ and _______________. c. Hadron ___________________________________. d. The hadrons can be subdivided into ________________ and ________________ according to their ____________________. The baryon number is defined as: ____________________________ where Nq is the number of ____________ Nq is the number of ____________ Both of them are composed of more fundamental particles called ____________. e. Baryons a baryons is an elementary particle that can be transformed into a _________________ or ________________ and some number of mesons and lighter particles. A baryon is made of __________________. f. Mesons a meson is a particle of intermediate mass. A meson is made of ________________ and _______________. g. Lepton a particle that interacts through gravitational, weak, and electromagnetic forces, but not the ____________________ is called a lepton. A lepton is much lighter than a proton. Examples of leptons are (1) _________________________________ (2) _________________________________ (3) _________________________________ h. Positrons A particle whose ____________ is the same as electrons, and whose ________________ is equal in magnitude but opposite in sign to the electrons. i. Neutrino a neutrino is a ______________ particle that has little mass but does possess both energy and momentum. 3 The Antiparticle all four forces protons, neutrons except strong force electrons, positions, neutrinos no. of quark = no. of antiquark (B = 0) no. of quark no. of antiquark = 3 (B =1)