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Q. An electron gun consists of two parallel, oppositely charged, flat plates (see diagram in Moodle). A nearly uniform electric field exists between these plates. The positively charged plate has a hole in the center, through which, high speed electrons exit. The electrons are initially at rest in the electric field near the negatively charged plate. The field causes the electrons to accelerate and pass through the hole in the positively charged plate. Calculate each of the following if the electrons exit the field with a speed of 4.45x106 m/s and the distance between the plates is 2.07 cm.
Find the potential energy lost by the electron as it passes through the electron gun.
Find the potential difference between the charged plates.
Find the strength of the electric field between the plates of the electron gun.
A charge of -3.0 nC is at the origin and a second charge of 13.0 nC is at x = 8.00 m. Find the magnitude and direction of the electric field halfway in between the two charges.
The triangular loop of wire in the drawing carries a current of I= 6.91 A. A uniform magnetic field is directed parallel to the side AB of the triangle and has a magnitude of 2.77 T.
The distance to the Andromeda Galaxy is estimated at about 2 ´ 106 light years. A light year is distance travelled by light in one year; if the speed of light is 3 ´ 108 m/s, about how far is it from our galaxy to Andromeda? (1 year = 3.15 ´ 107 s..
You're carrying a 3.6-m-long, 25kg pole to a construction site when you decide to stop for a rest. You place one end of the pole on a fence post and hold the other end of the pole 35cm from its tip.
A spring of force constant k=2.5*10^2 N/m is suspended form a rigid support. An object o mass 1.00 kg is attached to the uns How far below the starting point is equilibrium position for the object.
A microscope with an eyepiece lens of focal length 1.90 cm and an objective lens of focal length 1.15 cm is used to examine a section of the brain of a sacrificed rat. The distance between the lenses of the instrument is 24.0 cm and final image is vi..
Create the magnitude of the net gravitational force on moon
Next you eliminate the 11 kg mass, place the rod horizontally, and strike one end with a hammer. How much time t would elapse before a microphone at the other end of the bar will detect a disturbance.
A gymnast of mass 56.0 {rm kg} hangs from a vertical rope attached to the ceiling. You can ignore the weight of the rope and assume that the rope does not stretch. Use the value 9.81 {rm m/s^2} for the acceleration of gravity.
The escape speed from a very small asteroid is only 26 m/s. If you throw a rock away from the asteroid at a speed of 39 m/s, what will be its final speed.
What is new angular speed of the merry-go-round
An airplane has a mass of 2.6 x10^6 kg, and the air flows past the lower surface of the wings at 95m/s. If the wings have a surface area of 1200m2, how fast should the air flow over the upper surface of the wing if the plane is to stay in the air?..
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