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An electron gun in an old television picture tube is a device that uses an electric field to accelerate electrons. What magnitude of electric field is needed to accelerate an electron from rest to a speed of 4.0x10^7 m/s in a distance of .01m.
A mass attached to a spring vibrates 7 times in 22.19 seconds. What is the angular frequency (in radians/second) of the mass
What is the charge-conjugate reaction to K- + p ----> K-0 + n? Can a K-, p system be an eigenstate of the charge conjugation operator?
Two 10-cm-diameter charged rings face each other, 18.0cm apart. Both rings are charged to + 50.0nC . What is the electric field strength at the center of the left ring
The temperature of 2.00 moles of argon gas is lowered from 2.80 x 10^2 K to 1.90 x 10^2 K. Find the change in the average kinetic energy per atom.
A pendulum bob passes through the lowest part of its path at speed of 2 m/s. What is the tension in the pendulum cable at this point if the pendulum is 80 cm long
A parallel-plate air capacitor has a capacitance of 300 {\rm pF} and a charge of magnitude 0.250 \mu {\rm C} on each plate. The plates are 0.500 {\rm mm} apart. What is the surface charge density on each plate
A father racing his son has three-fifths the kinetic energy of the son, who has two-fifths the mass of the father. The father speeds up by 2.5 m/s, What is the original speed of the father
What is the lowest possible kinetic energy of the atom in the box and what velocity does the atom have in the absence of such a measurement?
Throughout three hours one winter afternoon, when outside temperature was 9° C, a house heated by electricity was kept at 21° C with the expenditure of 46kwh (kilowatt•hours) of electric energy.
A pendulum has a length L = 1.11m. It hangs straight down in a jet plane about to take off as shown by the dotted line, Calculate the magnitude of the plane's acceleration
A novice skier, starting from rest, slides down a frictionless 35.0 Degrees incline whose vertical height is 185 m. How fast is she going when she reaches the bottom
A freight company uses a compressed spring to shoot 1.7 kg packages up a 1m high frictionless ramp into a truck. The spring constant is 241 N/m and the spring is compressed 33 cm.
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