The net charge generated by a plastic comb rubbing against the fabric is a few micocoloumb (μC). If this load is 3.0 μC, what is the percentage change of mass of a 35 gram comb during this loading?

A 8-g charged plastic sphere charged to 75 µC is on top of a plastic spring with spring constant k = 400 N/m, which has a relaxed length of 10 cm. You then place another charged object 1 cm above (not touching) the sphere. Now, the spring is 9.5 cm long. Find the charge on the new second object.

One particle has a mass of 3.71 x 103 kg and a charge of +7.56 μC. A second particle has a mass of 7.17 x 103 kg and the same charge. The two particles are initially held in place and then released. The particles fly apart, and when the separation between them is 0.177 m, the speed of the 3.71 x 103 kg-particle is 126 m/s. Find the initial separation between the particles. V1,B V2,B 92 92 91 Number i 0.011 Units m "B 91

a. An electrically neutral penny, of mass 3.11 g, contains equal number of positive and negative charges. Assuming the penny is made of pure copper, what is the total positive (or negative) charge within a penny? Atomic mass of copper = 63.5 g/mol Na = 6.02 x 10 atoms / mol (Avogadro's number) CAADA Atomic Number of Copper = 29 protons/atom NOTE: you don't necessarily need chemistry for this.Dimensional analysis!!! b. Suppose the positive and negative charges could be isolated into two bundles and separated by a distance of 1.00 km. What would the force of attraction between the bundles be?

A charge of -8.5 μC is at x = 0 and a charge of -4.0 μC is at x = 6.0 cm. What is the electric field at x = 2.0 cm? Specify the direction with the sign of your answer. 1.7 x 108 V/m -2.9 x 106 V/m -2.1 x 108 V/m -1.7 x 108 V/m 2.1 x 108 V/m

Problem 4: Charge Q1 = 2.8 µC is located at r = (3.4i – 2.0j + 4.5k) m. A second charge Q, = 3.9 µC is located at r, = (8.0i – 3.6j – 9.0k) m. Part (a) What is the magnitude of the force of the second charge on the first charge in newtons? Numeric :A numeric value is expected and not an expression. Part (b) The force of the second charge on the first charge can be written using unit vectors as follows: F= Fi+F,j+F,k What is the value of F, in newtons? Numeric :A numeric value is expected and not an expression. Part (c) What is the value of F, in newtons? Numeric :A numeric value is expected and not an expression. Fy- Part (d) What is the value of F, in newtons? Numeric :A numeric value is expected and not an expression.

One particle has a mass of 3.71 x 10‍3 kg and a charge of +7.56 µC. A second particle has a mass of 7.17 x 103 kg and the same charge. The two particles are initially held in place and then released. The particles fly apart, and when the separation between them is 0.177 m, the speed of the 3.71 x 103 kg-particle is 126 m/s. Find the initial separation between the particles. V1,B V2,B 92 92 91 Number i Units "B 91

A conducting sphere of radius r1 = 0.18 m has a total charge of Q = 1.9 μC. A second uncharged conducting sphere of radius r2 = 0.46 m is then connected to the first by a thin conducting wire. The spheres are separated by a very large distance compared to their size.Randomized Variables r1 = 0.18 mr2 = 0.46 mQ = 1.9 μC What is the total charge on sphere two, Q2 in coulombs?

Suppose a speck of dust in an electrostatic precipitator has 8.0000 × 10+" protons in it and has a net charge of 2.00 nC (a very large charge fọr a small speck). How many electrons does the speck have? Include 5 significant figures in your answer. For this problem, use e = 1.6022 × 10¬1º C as the fundamental charge. n = number (5 significant figures)

You pull your t-shirt out of the washing machine and note that 1529 particles have become attached, each of which could be either an electron or a proton. Your t-shirt has a net charge of −2.77 10-17 C. (a) How many electrons are attached to your t-shirt? electrons (b) What is the mass of the particles attached to your t-shirt? kg