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The electron gun in an old CRT television accelerates electronsbetween two charged parallel plates (the cathode is negative; theanode is positive) 1.2 cm apart. The potential difference betweenthem is 25 kV. Electrons enter through a small hole in the cathode,are accelerated, and then exit through a small hole in the anode.Assume the plates act as a capacitor.
a. What is the electric field strength and direction between the plates?
b. With what speed doesan electron exit the electron gun if its entry speed is close tozero? [Note: ignore relativity]
c. If the capacitance of theplates is 1 nF, how much charge is stored on each plate? How manyextra electrons does the cathode have?
d. If you wanted to push anelectron from the anode to the cathode, how much work would youhave to do?
a 8.0-g string 0.87 m long is under tension. the string produces a 900-hz tone when it vibrates in the third harmonic.
Two identical boats travel through still water at 3 m/s. They start from the same point on the bank of a river and travel the same distance from the starting point, How fast is the current in the river flowing
Suppose a car is traveling at +23.7 m/s, and the driver sees a traffic light turn red. After 0.360 s has elapse, What is the stopping distance of the car
A charge of -3.00 µC is fixed at the center of a compass. Twoadditional charges are fixed on the circle of the compass (radius =0.100 m). The charges on the circleare -3.90 µC at the position duenorth and +5.00 µC at the position due east.
A motorist speeds horizontally of a 50.0 meter high cliff. If the motorist wants to land on level ground below 90.0 m form the base of the cliff. how fast must he motorcycle leave the cliff top to make this landing
A non conducting solid sphere of radius 8.40 centimeter has a uniform volume charge density. Evaluate what is the sphere volume charge density
The scale of a spring balance reading from zero to 200 N is12.5 cm long. A fish hanging from the bottom of the springoscillates vertically at 2.60 Hz. What is the mass of the fish
A go-kart travels a complete lap on a circular track with aradius of 500m in 50s. What is the average speed of the go-kart? What is the average velocity of the go-kart?
Two straight rods 60 centimeter long and 2 millimeter apart in a current balance carry currents of 18 Amp each in opposite directions. Find what mass must be located on the upper rod to balance the magnetic force of repulsion
A block weighing 10.82 N rests on a 34° inclined plane. Find the normal force exerted by the plane on the block
A meter stick is hinged at its lower end and allowed to fall from a vertical postion. iof its moment of inertia is Ml2/3 with what angular velocity does it hit the table
A copper wire, with resistivity 1.72 x 10-8 Ω•m, is 750 meter long and 2.5 millimeter in diameter. Evaluate what is the resistance of the wire in Ω•m
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