Question

1. Charge (2 pts each part) NOTE: You can find conversion factors in lecture notes and in your text. Your answer should have the correct number of sig figs! a) Common static electricity involves charges ranging from nanocoulombs to microcoulombs. How many electrons are needed to form a charge of -3.4nC? b) Suppose a lightning bolt moves 35.4 C of charge. How many fundamental units of charge eis this? c) Protons and neutrons are made up of combinations of two of the most common quarks, the u or up quark (charge +e), and the dor down quark (charge -e). How could three of these quarks combine to form a proton (charge +e) ? d) An amoeba has 2.00 x 10" protons and a net charge of 1.01 pc. How many fewer electrons are there than protons? e) You can bend water with static electricity (see figure to the right). Water is a polar molecule and acts like a dipole. Suppose that you bring a + charge source close to a stream of water. Draw a diagram to show the distribution of charges in the water, and explain why the water bends.

Answer 1

- As per Chegg policy, I can auswer only the first four questions, the I'll explain the last question through a) Charge of an electron = Static electricity charge= -1.6*10-19 -3.4810-4 (luc= 109C) No. of electrons = +6 -3.4x10-9 -1.6x10-19 = 2125x1067 b) I suit of charge = 106x10-19 - Lightning bolt charge= 35-40 of fundamental units = 35.4 = 22125 x 1016 106x10-14 c) What - and we Id do is we take two u quarks quach, so that. 2x1+2 e) + (1x(e)) te

d) The not charge is only due to the excess protius > No. of encess protows orar electrous 101010-12 1.6X 10-19 = 6,312,500 There are 6,312,500 tewer electrous than protous e) Since a water is a polar molecule it has a uet polarity ;ie. it has poles of positive & negative at its ends. On bringing static electricity near water, the charges altract or repel according to their polarity thus bending the stream of water TYM III

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