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A loop of wire embedded in the road at an intersection can be used to trigger a traffic signal. This is an application of magnetic induction. How do you explain this?
The lens of a slide projector with a focal length of a 120 mm projects a slide onto a screen that is 13 m away. How far from the lens must the slide be placed to form a sharp image on the screen? (in cm)
Research suggests that the electric fields in some thunderstorm clouds can be on the order of 10 kN/C. Compute the magnitude of the electric force acting on a particle with two excess electrons in the presence of a 10.0-kN/C field.
a metal surface has a photoelectric cut-off wavelength of 325.6 nm. it is illuminated with light of 259.8nm. what is
a student sits atop a platform a distance h above the ground. he throws a large firecracker horizontally with a speed
In a simplified model of a hydrogen atom, the electron moves around the proton nucleus in a circular orbit of radius 0.53 × 10^?10 m, Determine the period of the circular motion
It is observed that 4.2 min is required for the rotor to coast to rest from an angular velocity of 3600 rpm. Determine the average magnitude of the couple due to kinetic friction in the bearings of the motor.
in a classical model of the hydrogen atom the electron movesaround the proton in a circular orbit of radius 0.053 nm.
The drawings show three charges that have the same magnitude but may have different signs. Determine the magnitude of the net force on charge
A roller coaster having a total mass (including passengers) of 500 kg travels freely along a winding, frictionless track. Point A, E, and G are horizontal straight sections, what is the height of that point above the ground
For quasistatic approximations and Faraday's Law for an Amperian loop, find the induced electric field. You may assume the induced electric field goes in horizontal circles and its strength depends on radius. Find the induced electric field inside..
A parallel-plate capacitor is made of two flat metal plates pressed against a thin slab of dielectric material. What is the dielectric constant of the material that was initially used to fill the gap between the plates
the axes of two polarizers make a 71.3 deg angle to one another. what fraction of the light intensity is transmitted
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