A metal ball with -8 nC charge contacts a second metal ball and loses half its excess electrons. What force does the second metal ball exert on a proton 6m away?
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- A 0.10 g honeybee acquires a charge of 20 pC while flying. The electric field near the surface of the earth is typically 100 N/C , directed downward. What is the ratio of the electric force on the bee to the bee's weight? What electric field strength would allow the bee to hang suspended in the air?A solid plastic ball has a radius of 6.0 cm and has a charge of +3.o nC ( in nano-Coulombs) that is uniformly distributed throughout its volume. Imagine there is a proton being held 1.5 cm away from the surface of the solid plastic ball, and then the proton is released. The proton will accelerate away from the ball, as we know, due to the repulsive electric force. Assuming the ball doesn't move, how fast is the proton moving when it is 5.5 cm away from the surface of the ball?Common transparent tape becomes charged when pulled from a dispenser. If one piece is placed above another, the repulsive force can be great enough to support the top piece's weight. Assuming equal point charges (only an approximation), calculate the magnitude of the charge if electrostatic force is great enough to support the weight of a 16.3 mg piece of tape held 0.64 cm above another. (The magnitude of this charge is consistent with what is typical of static electricity.) (C)
- = 32.2 nC. The figure below shows a small, hollow, plastic sphere hanging vertically from a thin, lightweight thread. The sphere has a mass of 7.10 g and a uniformly distributed charge of 91 Directly below it is a second sphere with the same mass, but a charge of 92 = -58.0 nC. (Assume this second sphere is fixed in place.) The centers of the two plastic spheres are a distance d = 2.00 cm apart. 91 92 (a) What is the tension (in N) in the thread? 0.11154376 N (b) The thread will break if the tension in it exceeds 0.180 N. What is the smallest possible value of d (in cm) before the thread breaks? The analysis is the same as in part (a), including the magnitude and direction of the gravitational and electric forces. Note that Coulomb's law depends on the square of the distance d. Use the threshold value of the tension to solve for d. cmAt a particular moment, a proton is 10.0 cm away from a particle with charge 121 nC. If the speed of the proton at that time is m/s towards the particle, then what's its speed later when the proton is only 6.00 cm away?Two red blood cells each have a mass of 9.05 × 10-14 kg and carry a negative charge spread uniformly over their surfaces. The repulsion arising from the excess charge prevents the cells from clumping together. One cell carries -3.00 pC and the other -2.60 pC, and each cell can be modeled as a sphere 3.75 × 10-º m in radius. If the red blood cells start very far apart and move directly toward each other with the same speed, what initial speed would each need so that they get close enough to just barely touch? Assume that there is no viscous drag from any of the surrounding liquid. initial speed: m/s What is the maximum acceleration of the cells as they move toward each other and just barely touch? maximum acceleration: m/s?
- A small metal sphere, carrying a net charge of q1=+2.80uc, is held in a stationary position by insulting supports. A second small metal sphere with a net charge of q2= -7.80uc and mass 1.50 g, is projected the word q1. When the two spheres are 0.800m apart, q2 is moving toward q1 with speed 22.0 m/s. Assume that the two spheres can be treated as point charges. You can ignore the force of gravity. (a) what is the speed of q2 when the spheres or 0.400 m apart? (b) how close does q2 get to q1?9:09 docs.google.com 4. Applying Conservation of Charge: A researcher is analyzing a particle decay process. The data for one experiment shows a particle of charge -3e, decaying to form two new particles. One of the new particles has a charge of - e. -3e Choose -1 e +3 e n -2 e +2 e e with the correct words in the following Conservation of Charge Review: a) Charge is neither created nor destroyed, it can only be (siphoned/ transferred added) from one 10 points Q? -e * 25 points