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Question: Suppose that to create an electron filter you modify the setup shown in Fig. by drilling another small hole in the left-hand plate opposite the hole in the right-hand plate. (The holes are too small to have much effect on the electric field between the plates.) Suppose that you want to set up this apparatus so that when electrons are fired towards the holes, any electrons with speeds less than 107 m s-1 will be slowed down by the electric field between the plates and will not emerge from the other side, while electrons with higher speeds will emerge through the hole. Assuming your voltage source can be turned up as high as 500V, how would you adjust your apparatus to achieve your goal? Be sure to specify the distance between the plates and the polarity of the voltage.
Fig. An arrangement of charged plates for accelerating positively charged ions.
A coil of 57. turns of wire has a diameter of 9.5 cm and carries 7.2 Amperes. How many Gauss is that
The windshield of a speeding car hits a hovering insect. Consider the time interval from just before the car hits the insect to just after the impact. Which of the following are right.
a 250 kg merry-go-round in the shape of a uniform solid horizontal disk of radius 1.50 m is set in motion by wrapping a
A 2.9-kg box is sliding along a frictionless horizontal surface with a speed of 1.8 m/s when it encounters a spring. Determine the initial speed the box would need in order to compress the spring by 1.2 cm
An ideal gas expands at a constant total pressure of 2.5 atm from 3.45 L to 6.70 L. calculate the total heat flow into the gas
A particle of mass M is subjected to a force F(t) = kte-alphat, where k is a constant and alpha = 0.5 s-1. If the particle is initially at rest, calculate the position, velocity and acceleration as a function of time.
A point charge of magnitude 9.15uC is at the center of a cube with sides of length 0.470m. find the electric flux through each of the six faces of the cube
if the magnitude of the total acceleration of the car's mass center is the same at B as at A, compute the radius of curvature of the dip in the road at B
A point charge Q = 7.80 x 10-6 C is at the center of a conducting spherical shell of radius R = 3.50 cm. The total charge of the shell is -7.80 x 10-6 C. What is the field in the region between the point charge and the shell
The froghopper, Philaenus spumarius, holds the world record for insect jumps. When leaping at an angle of 58.0^\circ above the horizontal, some of the tiny critters have reached a maximum height of 52.7cm above the level ground.
Select a topic focusing on your career goals that you can research using qualitative data collection methods and collect data that you will need to analyze and choose the important information.
find the average speed of the electrons in a 1.7 cm diameter copper power line when it carries a current of 52 a. the
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