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A) What must the charge (sign and magnitude) of a particle of mass 1.42g be for it to remain stationary when placed in a downward-directed electric field of magnitude 610N/C ? Use 9.81m/s^2 for the magnitude of the acceleration due to gravity.
B) What is the magnitude of an electric field in which the electric force on a proton is equal in magnitude to its weight? Use 1.67×10^-27kg for the mass of a proton, 1.60×10^-19C for the magnitude of the charge on an electron, and 9.81m/s^2 for the magnitude of the acceleration due to gravity.
Three charges are located at the corners of an equilateral triangle with sides 20 cm. What is the electric field at the center of the triangle
suppose the radius of the ball is very small compared to other length scales in the problem. Take starting level as step 0, the next step down as step 1, and so on.
mass, 0.057 kgs, driving force F0 = 8.9 N and linewidth 48 radians/second, has its damping constant, b, changed, Determine the new damping constant,b
A sinusoidal voltage ?v = (100 V) sin (200t) is applied to a series RLC circuit with L = 40 mH, C = 120 ?F, and R = 32 ?. What is the maximum current in the circuit
Find the radius of the star Rigel, the bright blue star in the constellation Orion that radiates energy at a rate of 2.7*10^32W and has a surface temperature of 11,000K . Assume that the star is spherical. Use 5.67*10^-8W/m^2*K^4 for the Stefan-Bo..
Eight lights are connected in parallel to a 110 V source by two leads of total resistance 2.20. If 240 mA flows through each bulb, what is the resistance of each.
A mass of 1 kg is hung vertically from a spring stretching the spring .20 m. It is then pulled .10 m below its equilibrium position, find the time to make one complete cycle
a motor starts from rest with an angular acceleration of 12. rad/s ^2 what is the motor angular speed 4.0s later? how many revolutions does it make in this period of time
An ideal gas at 23.3°C and a pressure 1.60 105 Pa is in a container having a volume of 1.00 L. (a) Determine the number of moles of gas in the container. mol (b) The gas pushes against a piston, expanding to twice its original volume, while the press..
A ladder of length L = 2.3 m and mass m = 19.0 kg rests on a floor with coefficient of static friction ?s = 0.49. Assume the wall is frictionless. What is the normal force the floor exerts on the ladder
A dentist uses a mirror to examine a tooth. The tooth is 1.01 cm in front of the mirror, and the image is formed 10.9 cm behind the mirror. Determine the mirror's radius of curvature
An event occursin system K' at x' = 2m , y'=3.5mz'= 3.5 m and t'=0. What are the coordinates of the event in sytem
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