TOPIC: Electric Charge Activity A: Sample Problem: Compute the elechfcaland gravitaonalforce between an electron and a proton in a hydrogen atom. Electrical Force Nmz) {(1.6 x 10190)(1.6 x 10190} (5.29 x 1011 m)2 _ 9.00 x 109Nm2(1.6 x 1019(3) (1.6 x 10190)] 0200.200 11132 = .23 x 10-8 N Gravitational Force Universal gravabbnal constant = 6.67 x 101 The radius of the lowest energy orbit for the electron is r = 5.29x10 11m (667 x 1011 Nmz) {(1.67 x 1027kg)(9.11 x 10'31kg)} kgz (5.29 x 1011 m)2 6.67 x 10'11Nm2(1.67 x 10'27kg)(9.11 x 10'31kg) { kgz (5.29 3: 1011101)2 ] 3. 63 x 10-" N Compare Kagof proton and electron of H P; 8.23 x 10'3N =;F =2.27 1 39F g 3.63 x 10\"\"N '3 x 0 9 Solve: A point charge, (.31 = 2.00 ,uCis placed 0.500 m from another point charge q2 = 5.00 M. Calculate the magnitude and direction of the force of each charge. Solve: Solve electrostatic force bet 2 protons of Helium separated 2.4 x 10'15m apart Solve: If we compare the repulsive force between the two protons in a Helium nucleus to the attractive force between the electron and the proton in Hydrogen atom. We see their ratio is Electric force is 1039 times . reater than - ravitational force Solve: Two identical metal spheres are placed 0.200 m apart. A charge of 9.00 #6 is placed on one sphere while a charge of 3.00 w: is placed on the other. What is the force on each of the sphere. Activity 3. Using the data below, identify what happens to objects when they rub against each other. Materials in contact Positively Charged Negatively charged Balloon and soda can Balloon and hair Activity c. Tear paper (or Styrofoam) into its smallest pieces (as much as you can). Get a pen and rub it into your clothes (preferably silk). Put the tip or cover of your pen near the small bits of paper. Observe what happens next and write your observation on the space provided. 11!. GENERALIZATION Using the law of charges, state and explain the type of electrostatic force of the following: 1. Two protons 2. Two electrons 3. One proton and one electron IV. APPLICATION Using the Equation Fe = KW\"), complete the table below. r2 Show your solution. Electrostatic Force (F) Electrostatic constant Charge (ql) in Charge (q;} in Distance between in newton(N} (k) in N.m1/C2 coulomb (C) coulomb (C) two charges (R2) in meter (m) N 2 . 1 '9 7. 1 'B 1 '2 900x109; 30x0 C 0x0 C 6x0 m 7. 1 \"N N 2 4. 1 '5 4-. 1 '5 0x 0 900x109; 0x 0 C 5:: 0 C 1. 1 2N N 2 . 1 '6 .4 0x 0 900x109 :21 30:: i} C 0 0m 65 N 9 Not2 6.0 I rst: 0.50 m 9 00 x 10 62 Nm2 2.0 at 104C 8.0 10-56 0.30 m 9 00 x 10'3 2 x DIRECTIONS: Identify the basic parts of a research paper described in each statement. Choose the letter of your answers from the word bank below and write your answer on the space provided. D A. Introduction D. Definition of Terms G. Hypothesis B. Chapter 1 E. Conceptual Framework H. Scope and delimitation C. Significance of the Study F. Statement of the Problem 1. serves as the plan or the blueprint of the study. 2. includes definitions of words operationally used in the study. 3. serves as an overview of the research topic under investigation. 4. sets the parameters of the study which narrow down the scope of inquiry. 5. states the concrete terms that a researcher expects to happen in the study. 6. cites the benefits certain groups of persons will get from the outcome of the study. 7. clearly expresses the specific direction or focus of the research problem or inquiry. 8. elaborates the origin of the research problem which led to the conduct of the study. 9. covers the general statement of the problem as well as the specific research questions to be answered in the study. 10. gives the concepts to be covered in the study as well as its boundaries in terms of the respondents /participants, sampling technique, locale and the research methods to be used