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An electron is accelerated through an electric potential of 166 V, then enters a 13 Gauss magnetic field in a direction at a right angle to the magnetic field vector. Find the radius (in cm) of the subsequent circular path for this electron. Express the answer (without the unit) with two decimal places.
A simple dc-motor is made up of a single coil rotor placed between two permanent magnets. How many turns should the coil have so that the motor can supply a torque of 0.100 N-m
Speedboat A negotiates a curve whose radius is 198 m. Speedboat B negotiates a curve whose radius is 290 m. Each boat experiences the same centripetal acceleration. What is the ratio vA/vB of the speeds of boats.
By what method will a positively charged rod produce a negative charge on a conducting sphere that is placed on an insulating surface?
Which of the following will create a magnetic field? Which of the following will emit an EM wave? Choose all that apply.
A solid conducting sphere with a radius of 35.4 cm contains atotal charge of 5.46 mC, evenly distributed over its surface.(a) What is the direction of the electric field at its surface? (b)What is the strength of the electric field at its surface?
A child on a sled starts from rest at the top of a 15.0° slope. If the trip to the bottom takes 17.3 s how long is the slope? Assume that frictional forces may be neglected
Two identical charges +5.5micro coulomb charges, each of mass 1mg, are initially spaces 6.5cm apart. Determine the velocity of either charge when they are very far away from each other
A car travels at a constant velocity 30im/s for 20km, then it travels at 40im/s for the next 20km and, finally at 0im/s for the last 20km. Find the Average velocity and speed for the entire trip.
The edge of the thimble of a micrometer moves a distance of 2.0 mm when it is given four complete revolutions. Find the pitch of the micrometer
A student is reading a lecture written on a blackboard. The lenses in her eyes have a refractive power of 54.35 diopters, what is the height of the image on her retina
A suitcase (mass m = 18 kg) is resting on the floor of an elevator. What pressure (in excess of atmospheric pressure) is applied to the floor beneath the suitcase
The sound intensity 44 m from a wailing tornado siren is 0.10 W/m2 -. Estimate the maximum distance at which the siren can be heard
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