You shuffle your feet on carpet and build up a negative static charge on your skin. Which atom of a water molecule from the humidity in the air is the first to contact your skin?  A. Either of the hydrogen atoms. B. The oxygen atom. C. All atoms have an equal chance of contacting your skin.

Use the following constants if necessary. Coulomb constant, k = 8.987 x 10° N m2 /C. Vacuum permitivity, eo = 8.854 x 10 12 F/m. Magnitude of the Charge of one electron, e =-1.60217662 x 10-19 C. Mass of one electron, m, = 9.10938356 x 10-31 kg. Unless specified otherwise, each symbol carries their usual meaning. For example, uC means micro coulomb. Y R. Suppose you have 5 point charges q to q, distributed along a semi-circle maintaining equal distance. The charge q6 is on the center of the circle which is also the origin of given coordinate system. The radius of the semi-circle is R = 34 cm and the magnitude of the charges are as follows : 91 = = 19 µC, q2 = q4 = 32 µC and q = q6 = -25 µC. a) Find the vector that points from q to g6 and call it F1,6- b) Calculate the coulomb force on g6 due to q in unit vector notation and call it F16 c) Find the vector that points from q3 to g6 and call it F3,6- d) Calculate the coulomb force on q6 due to g in unit vector notation and call it F36. e)…

3. An amoeba may have 1.0 x1016 protons and a net charge of +0.30 pC (1 pC = 10-12 C). A. How many electrons is this amoeba missing? B. Protons and electrons tend to pair up (because of Coloumb's Law). However, some protons are missing electrons here. What fraction of all the protons are missing electrons?

Say you have a point charge of one Coulomb and a hydrogen atom some distance away. Within what distance would the difference of forces on the proton and electron from the Coulomb charge exceed the attraction between the proton and electron that holds the hydrogen atom together. Treat the hydrogen atom as a proton and electron 0.53 × 10−10 m (a.k.a., one Bohr radius) apart.

1. Adjust the voltage to 0.05x V and adjust the plate area to 10y mm² and the separation distance to 0.2z mm. What is the magnitude of the charge (in Coulombs) stored in each plates for x= −27, y= 21, and z= 39?  2. Adjust the voltage to 0.05x V and adjust the plate area to 10y mm² and the separation distance to 0.2z mm. What is the magnitude of the Potential Energy in Joules in capacitor for  x= -8 and y= 10? 3. Adjust the voltage to 0.05x V and adjust the plate area to 10y mm² and the separation distance to 0.2z mm. What is the magnitude of the charge stored in each plates for x= −25 and y= 14?

8) The nucleus of a silver atom has a charge +47 e and is fixed at the origin of a cartesian coordinate system. An alpha particle of mass 6.68 × 10^−27 kg and charge +4 e is fired along the x-axis from infinity with an initial kinetic energy of 7.00 × 10^−13 J. At what distance from the silver nucleus will the alpha particle come (momentarily) to rest?