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  • A proton (m= 1.67e-27 kg) is accelerated from rest through a potential difference of 11.5 kV...

    A proton (m= 1.67e-27 kg) is accelerated from rest through a potential difference of 11.5 kV before entering a velocity selector. If the B- field of the velocity selector is perpendicular to the velocity and the electric field (E) has a magnitude of 3.5e6 N/C, what is the required magnitude of the magnetic field (B) if the proton is undeflected?

  • A proton moves through a region containing a uniform electric field given by E with arrow...

    A proton moves through a region containing a uniform electric field given by E with arrow = 64.0 ĵ V/m and a uniform magnetic field B with arrow = (0.200 î + 0.300 ĵ + 0.400 k) T. Determine the acceleration of the proton when it has a velocity v with arrow = 230 î m/s.

  • cho 2. A chain rests on a small horizontal platform at the top of a smooth...

    cho 2. A chain rests on a small horizontal platform at the top of a smooth inclined plane (angled). A block of mass M is attached to one end of the chain. At t=0 the block starts sliding down the incline, with initial velocity zero. The corner over which the chain passes is smooth and rounded, and the mass per...

  • EACH 10 POINTS ONE PROBLEM/WEEK WILL BE SELECTED RANDOMLY FOR GRADING 1. The tied crank and...

    EACH 10 POINTS ONE PROBLEM/WEEK WILL BE SELECTED RANDOMLY FOR GRADING 1. The tied crank and gear mechanism gives rocking motion to crank AC, necessary for the operation of a printing press. If link DE has the angular motion shown, determine the respective angular velocities of gear F and crank AC at this instant, and the angular acceleration of crank...

  • 11. A uniform thin rod of length L and mass M, pivoted at one end as...

    11. A uniform thin rod of length L and mass M, pivoted at one end as shown above, is held horizontal and then released from rest. Ignore all effects due to friction. (a) Find the angular speed of the rod as it sweeps through the vertical position. solution: 、13g / L (b) Find the force exerted on the rod by...

  • An instant cold pack consists of a bag containing solid ammonium nitrate (NH, NO, and a...

    An instant cold pack consists of a bag containing solid ammonium nitrate (NH, NO, and a second bag of water. When the bag of water is broken, the pack becomes cold due to dissolving ammonium nitrate. Which of the following statements about this process is correct: ered 1.00 estion Select one: a. AH > (enthalpy change is positive) b. AS...

  • please answer in full and clearly . i would really appreacite your help :) Raceco Ais...

    please answer in full and clearly . i would really appreacite your help :) Raceco Ais traveling on a strach portion of the track while racecar Bis traveling on a crcular portion of the track. The speed of racecar Ais 260 km/h and the speed of racecar Bis 220 kmh. At the instant shown, the speed of Ais ncreasing at...

  • Pin Pis attached to the collar shown the motion of the pin is guided by a...

    Pin Pis attached to the collar shown the motion of the pin is guided by a slot cut in bar BD and by the collar that slides on rod AE. Rod AE rotates with a constant angular velocity of 3 radis clockwise and the distance from A to Pincreases at a constant rate of 4 fus. Determine at the instant...

  • One end of a cord is fixed and a small 0.600 kg object is attached to...

    One end of a cord is fixed and a small 0.600 kg object is attached to the other end, where it swings in a section of a vertical circle of radius 2.00 m as shown in the figure below. When 9 = 26.0 degree, the speed of the object is 8.10 m/s. At this instant, find each of the following....

  • please help to deal with these 3 questions, thank you so much~~~ Which of the equations...

    please help to deal with these 3 questions, thank you so much~~~ Which of the equations below correctly describes Hubble's law? (d: distance, z: redshift, c: speed of light, Ho: Hubble's constant) Select one: o a. cz = Hod cross out o b. z = H. d cross out c. cz= Ho/d cross out cross out d. dz= Ho C...

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