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An electron with speed 1x106 m/s is shot perpendicular to the field lines of a uniform magnetic field of 0.02 T. The electron will follow a circular path with the magnetic forcing providing the centripetal acceleration. What is the radius of this circle?
An airplane is flying through a thundercloud at a height of 2400 m. (Flying at this height is very dangerous because of updrafts, what is the electric field at the aircraft
Two ships are moving along a line due east. The trailing vessel has a speed of 62.0 km/h relative to a land-based observation point, What frequency is monitored by the leading ship
A 100 pf capacitor and a 400 pf capacitor are each charged to 2kv. What is the equilibrium voltage of each capacitor
a small solid disk of mass m and radius r rolls without slipping down a ramp. if it starts from rest at the top of the
An elastic cord is 66 cm long when a weight of 66 N hangs from it but is 86 cm long when a weight of 76 N hangs from it. What is the "spring" constant k of the elastic cord.
You charge an object by rubbing it, and then shake it at 1 Hz. How much energy does each photon carry
A catapult on a cliff launches a large round rock towards a ship on the ocean
A 0.250 kg ball attached to a string s being swung in a vertical circle, like a roller coaster doing a loop-de-loop, with a radius of 1.15 m. What is the minimum speed at the top of the circle to keep the string from going slack
A person lifts a 5kg cement block a vertical distance of 2.3m and after that aeries the block horizontally a distance of 6m. Determine the work completed by the person and by the force of gravity in this process.
a quasars spectrum shows a shift in spectral lines of 0.158. Use the doppler-shift formula to determine what recession velocity this shift indicates, calculate the recession velocity in kms per second
A quarter-pound hamburger with all the fixings has a mass 210g . The food energy of the hamburger is 2.4MJ. What is the energy equivalent of the mass of the hamburger
Rank the vector combinations on the basis of their angle, measured counter clockwise from the positive x axis. Vectors parallel to the positive x axis have the angle of 0. All angle measures fall between 0 and 360.
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