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An electron with kinetic energy 3.10keV circles in a plane perpendicular to a uniform magnetic field. The orbit radius is47.0cm.
a) Find the speed of the electron.b) Find the magnetic field.c) Find the frequency of circling.d) Find the period of the motion.
a disk is spinnning at a rate of 10 rad/s. a second disk of the same mass and shape, what is the final angular velocity of the two disks
Atmospheric pressure is about 1.0 105 Pa on average. What is the downward force of the air on a desktop with surface area 0.1 m2
In an experiment on the photoelectric effect, a cessium plate is illuminated with UV light of wavelength 2000 angstroms. The stopping potential is found to be 4.21 volts. What is the work function of the cessium surface?
The energy of sunlight hitting the earth is about 1400 W/m^2 (where 1 W= 1 J/s) in mid day. Given that the sun is about 150 million km from the earth, estimate the total output of the sun
In the rectangle in the drawing, a charge is to be placed atthe empty corner to make the net force on the charge at cornerA point along the vertical direction
1. a resonant circuit in a radio receiver is tuned to a certain station when the inductor has a value of 0.157 mh and
A certain freely falling object, released from rest, requires 1.90 s to travel the last 36.5 m before it hits the ground. Find the total distance the object travels during the fall
A body is suspended vertically from an ideal spring of spring constant 3.1 N/m. The spring is initially in its relaxed position. What is the maximum kinetic energy of the body
A diverging lens (f = -11.0 cm) is located 25.0 cm to the left of a converging lens (f = 36.0 cm). What is the height of the final image
a 137cs source has an activity of 700 microci. a gamma photon with energy 0.662 mev is emitted with a frequency of
the equation of continuity states the mass flow rate has the same value at every position along a tube that has a
A 2{rm kg} box rests on a plank that is inclined at an angle of 65 ^circ above the horizontal. The upper end of the box is attached to a spring with a force constant of 390 N/m.
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