Two oppositely charged particles are far, far apart – so far apart that they just barely interact at all; the force each feels is tiny. They are interacting so weakly that the potential energy of this two-particle system is just about zero. (Potential energies happen because of interactions between two or more things.) As in previous questions, imagine one particle to be stationary and the other one to be moving.
a. At this moment, what is the system’s kinetic energy if the system’s total energy is 4.0x10-20 J?
b. We can imagine that the moving particle got kinetic energy at that point because it felt a “kick” (i.e., a force that did positive work) from some other object. Calculate the system’s potential energy for a time when the moving particle, which has a charge of −2.5x10-19 C, is 1.0x10-8 m from the stationary particle, which has a charge of +2.5x10-19 C. k = 9.0x109 Nm2/C2.
c. Calculate the system’s kinetic energy when the particles are 2.0x10-8 m apart.
Two oppositely charged particles are far, far apart – so far apart that they just barely...
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8. Two OPPOSITELY charged particles at rest are separated by a distance R and have a total electric potential energyU. One of the charges is at a fixed position, but the other is free to move. Because the charges are attracted towards one another, the charge that is free to move accelerates towards the one that is fixed. When distance between the charges is reduced to K , which of the following must ne...
D. Here are several pairs of charged particles. For each pair, draw two arrows, one for the force felt by the right-hand particle and the other for the force felt by the left- hand particle. The arrows must correctly show the direction of the force and the relative arrows must correctly show the relative magnitudes of the forces. For example, if one force is three times stronger than another, its arrow must be three times longer The relative lengths must...
10) The electric potential energy (also called electrical energy) stored in a system of two charged particles a distance d apart is kg1g2 where particle 1 has charge q, particle 2 has charge g2, and Coulomb's constant has the value k 8.99x10 N m2/c2 If the two particles both have 1 C of charge, masses of 1 kg, and are initially a distance of 2.6 m apart, how fast will either be moving when they are very far (approximately infinitely...
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D. Imagine a negatively charged particle (9--0.2 C) free to move back and forth along a straight line. There are other nearby charged particles that create electric potential and electric field at all points on the line. The system is made up of the negatively charged particle and the other particles that created the potential and field. As usual, we will assume an isolated system, so that this system's...
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A Imagine a negatively charged particle, A approaching another negatively charged particle, B, along the path shown in the diagram. A moves from point X to point Y. These two particles form an isolated system, which means no work is done by external forces; therefore, the system's total energy does not change. A foelsan clectrical force (an repelling force) from B while it approaches B. Therefore, work is done...
1. Parallel plates. You have two equal but oppositely charged parallel conducting plates, separated by 10 cm. A voltmeter shows that the potential difference between the plates is 500 V. (a) Which is at a higher potential, the positive or negative plate? (b) How big is the electric field between the plates? (c) You let go of an electron next to the negative plate. How much work does the electric field do in moving the electron to the positive plate?...
direction while particle 2 travels along the positive y direction, Two positively charged particles are travelling through space in each others' vicinity. Using the standard r-y-z coordinate grid, particle 1 travels along the positive heading directly for the first particle from below. 3) Which combination of options below are the most accurate combination of statements. [Enter your answer as a string of the letter options you believe are correct. For instance, if you think options A, D, and E are...
D. Since the proton is moving while feeling a force, work is done on the proton: Won P = Felec Mlax Icoso, where lax is the magnitude of the proton's displacement and is the angle between the direction of that displacement straight to the left in this case) and the direction of the force on the proton. While the proton is approaching the nucleus the work done on it is positive, negative, zero). Important: our attention is now focused on...
7:35 exam 2.docx Not saved yet 17.) True of False. Microwaves have higher frequency thus shorter wavelengths than IR heat radiation. 18.) Electromagnetic radiation is produced when (a) a vacuum is created (b)charges move (c)electric fields oscillate (d)magnetic fields are constant 19.) Transverse waves travel by (a)up and down propagation (b) compressions (c)sound waves (d)electromagnetic waves 20.) True or False. Electromagnetic rays need only air to travel. 21.) Sound waves are examples of what wave format? (a)transverse (b)orthogonal (c)longitudinal (d)none...