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a) The earth mac field is 5*10^-5T. an electron of 3*10^4 eV cosmic ray is moving in a plane which is perpendicular to the lines of the earth mag. field. calculate the speed of the electron to determine the mag. force on this electron
b) assume the electron #a is moving in circular orbit c) at fermilab accelerator, protons of momentum 5.3*10^-16 SI are held in a circular orbit by a vertical mag. field. calculate the required magnetic field to accomplish this.
Let the drag force on a ball of mass m moving through air in the gravity-free bubble include both "viscous" drag F1=-kv, Find the velocity v of a ball thrown with initial speed v0.
What is the speed of an electron with a de Broglie wavelength of 0.140nm and 0.140nm
By what percentage does the density of a bowling ball change (assuming it is a uniform sphere) when it is taken from room temperature (68F ) into the cold night air in Nome, Alaska (-40F ). Assume the ball is made out of a material that has a linear ..
A movig particle encounters an external electric field that decreases its kinetic energy from 9740 eV to 5690 eV as the particle moves from position A to position B. Determine the charge of the particle
a mass of 200 g vibrates horizontally in Simple Harmonic Motion with a frequency of 30 Hz and amplitude 20 cm. calculate the total energy of the motion
A 55.0-kg woman stands at the rim of a horizontal turntable having a moment of inertia of 460 kg · m2 and a radius of 2.00 m. With what angular speed does the turntable rotate
You are driving your car and the traffic light ahead turns red. You apply the brakes for 2.5s and the velocity decreases to +4.62 m/s. What is the cars deplacement
Visible light passes through a diffraction grating that has 900 slits per centimeter, and the interference pattern is observed on a screen that is 2.74 from the grating. What is the difference between these wavelengths
A ladder of length L = 2.5 m and mass m = 15.0 kg rests on a floor with coefficient of static friction ?s = 0.57. Assume the wall is frictionless. What is the minimum angle to keep the ladder from sliding
A curve of radius 35 m is banked for a design speed of 64 km/h. If the coefficient of static friction is 0.34 (wet pavement), at what range of speeds can a car safely make curve.
A long uniform wooden bar with square crosssection floats on water. Show that , if the relativedensity of wood is 0.50, the bar will float with all fourfaces making an angle of 45 degrees with the water surface.
Spinal fluid pressure can be measured using a spinal tap in which a needle is inserted in the patient's lower back with the patient sitting upright on an examination table. The pressure due to the weight of the spinal fluid (given that its density..
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