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A mass spectrometer is being used to separate common oxygen- 16 from the much rarer oxygen-18, taken from a sample of old glacial ice. (The relative
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Physics: Principles with Applications
- In a long, .straight, vertical lightning stroke, electrons move downward and positive ions move upward and constitute a current of magnitude 20.0 kA. At a location 50.0 m east of the middle of the stroke, a free electron drifts through the air toward the west with a speed of 300 m/s. (a) Make a sketch showing the various vectors involved. Ignore the effect of the Earth's magnetic field. (b) Find the vector force the lightning stroke exerts on the electron. (c) Find the radius of the electrons path. (d) Is it a good approximation to model the electron as moving in a uniform field? Explain your answer. (e) If it does not collide with any obstacles, how many revolutions will the electron complete during the 60.0-s duration of the lightning stroke?arrow_forwardA particle with a charge of -8.0x10-18 C moves to the left at a speed of 4x103 m/s. It enters a region with a uniform E- and B-field. The E-field has a magnitude of 0.5 N/C and points vertically downward. As the particle enters the region of the E- and B-field, it continues moving to the left at a constant speed. No deflection is observed. Neglect the effects of the Earth's gravitational and magnetic field on the particle. Draw a force diagram showing all of the forces exerted on the particle as it travels through the E- and B-fields. Determine the magnitude and direction of the B-field.arrow_forwardA particle with a charge of -1.5 x 10-18 C moves in a straight line at a constant velocity of 2.0 x 103 m/s straight upwards through a region of uniform magnetic field and uniform electric field. The uniform electric field has a magnitude of 0.5 N/C and points to the right. No deflection from the particle's straight path is observed. Ignore the impact of Earth’s magnetic field and Earth’s gravitational field on this particle. In a neat and organized fashion, write out a solution which includes the following: A sketch of the physical situation with all given physical quantities clearly labeled. If a quantity in the sketch is unknown, label it as such. Draw a force diagram showing all of the forces exerted on the particle. Answer 1 and 2 pleasearrow_forward
- A particle with a charge of -1.5 x 10-18 C moves in a straight line at a constant velocity of 2.0 x 103 m/s straight upwards through a region of uniform magnetic field and uniform electric field. The uniform electric field has a magnitude of 0.5 N/C and points to the right. No deflection from the particle's straight path is observed. Ignore the impact of Earth’s magnetic field and Earth’s gravitational field on this particle. In a neat and organized fashion, write out a solution which includes the following: A sketch of the physical situation with all given physical quantities clearly labeled. If a quantity in the sketch is unknown, label it as such. Draw a force diagram showing all of the forces exerted on the particle. Determine the magnitude and direction of the B-field such that the particle travels in a perfectly straight line. Clearly show all steps, starting from generalized equations. Explain your mathematical work in words. Your explanation should cover both what you did…arrow_forwardTwo atoms of the same substance, one singly ionized and the other triply ionized, are eachaccelerated from rest through same potential difference. The ions enter the same uniformmagnetic field at 90 degrees. Derive an expression fora) their velocity (V2/ V1) entering the field. b) their radii (r2/ r1) of curvature in the field.arrow_forwardAn electron in a television tube moves with a speed of 6.44 107 m/s, in a direction perpendicular to the Earth's field, which has a strength of 5.00 10-5 T. (a) What strength electric field must be applied perpendicular to the Earth's field to make the electron move in a straight line? kV/m(b) If this is done between plates separated by 1.10 cm, what is the voltage applied? (Note that TVs are usually surrounded by a ferromagnetic material to shield against external magnetic fields and avoid the need for such a correction.) Varrow_forward
- When a moving charged particle enters a uniform magnetic field in a direction parallel to the field lines, the particle's a. direction is changed b. velocity magnitude is changed c. energy consumed is changed d. motion is unaffected How about if the direction is perpendicular to the field lines?arrow_forwardAn accelerating voltage of 2.50 x 103 V is applied to an electron gun, producing a beam of electrons originally traveling horizontally north in vacuum toward the center of a viewing screen 35.0 cm away. What are (a) the magnitude and (b) the direction of the deflection on the screen caused by the Earth’s gravitational field? What are (c) the magnitude and (d) the direction of the deflection on the screen caused by the vertical component of the Earth’s magnetic field, taken as 20.0 μT down? (e) Does an electron in this vertical magnetic field move as a projectile, with constant vector acceleration perpendicular to a constant northward component of velocity? (f) Is it a good approximation to assume it has this projectile motion? Explain.arrow_forwardTwo atoms of the same substance, one singly ionized and the other triply ionized, are eachaccelerated from rest through same potential difference. The ions enter the same uniformmagnetic field at 90o. Derive an expression fora) their velocity (V2/ V1) entering the field.b) their radii (r2/ r1) of curvature in the field.arrow_forward
- A SQUID detects a magnetic field of 1.8 * 10-14 T at a distanceof 13 cm. How many electrons flow through the neuron per second? Treat the neuron as a straight wire.A. 1.2 * 1010 B. 2.3 * 1010C. 7.3 * 1010 D. 9.2 * 1010arrow_forwardA long horizontal wire carries a curren such that 12.13 x 1018 electrons per second flow through any given point from left to right. What is the magnitude of the field of the long wire at a point 20mm parallel to its north? Two straight, parallel, current-carrying wires separated by a distance of 75.5mm carry the same 22 350 A-currents, flowing in similar directions. What is the force per unit length exerted by the two wires upon each other? A distance of 3 cm separates two straight, parallel, current-carrying wires with currents 18 500 A and 19 350 A, respectively. What is the force per unit length exerted by the two wires upon each other?arrow_forwardTwo parallel wires are separated by 0.25 m. Wire A carries 5.0 A and Wire B carries 10 A, both currents in the same direction. The force on 0.80 m of Wire A is: 1.0 x 10^(-5) N. 1.6 x 10^(-5) N. 2.6 x 10^(-5) N. 3.2 x 10^(-5) N. 3.4 x 10^(-5) N.arrow_forward
- Physics for Scientists and Engineers, Technology ...PhysicsISBN:9781305116399Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning