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iPad :43 PM * 57%- According to our records you have not yet redeemed an access code for this class or purchased access online. The grace period will end Friday, January 26 2018 at 12:00 AM EST. After that date you will no longer be able to see your WebAssign assignments or grades Get access now 1. -0 points UCFColPhysEML1 1.W.001 My Note Fundamental understanding of physics is characterized by conceptual thinking. In this worksheet, in addition to solving problems and earning problem-solving skills, you will be answering several concept questions based on basic properties of electric charge and force law that describes the interactions between electric charges. Also, you should know basic math and vector addition/subtraction to solve problems in this worksheet. So, make sure that you have answered and understood every question in last week's worksheet on vectors. mp = 1.673 x 10-27 kg, me = 9.109× 10-31 kg, mn = 1.675x 10-27 kg, Physical constants: e = 1.602 x 10-19 C, k = 8.988 x 109 N·m2/C2. Charge (1) A metal sphere has a charge of +7.0 HC. What is the net charge after 9.00 x 1013 electrons have been placed on it? This answer has not been graded yet. (2) An alpha particle is the nucleus of a helium atom with no electrons. What would be the charge on two alpha particles?Explanation / Answer
Answering 4 parts:
1) charge on 1 electron = -1.6 x 10^-19 C , charge on 9 x 10^13 eleectrons= -9x 1.6 x 10^ -6 C = -14.4 micro C
Net charge on sphere= -7.4 micro C
2) charge on 2 alpha particles= + 4 e = 4 x 1.6 x 10^-19 C
3) The charge is neither created nor destroyed, it's always conserved. When a neutral object becomes charged, the charges mainly redistributes.
4) An ion is an atom or molecule which has either gained or lost electrons, thus acquiring charge on it.
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