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A special electronic sensor is embedded in the seat of a car that takes riders around a circular loop-the-loop at an amusement park. The sensor measures the magnitude of the normal force that the seat exerts on a rider. The loop-the-loop ride is in the vertical plane and its radius is 19 m. Sitting on the seat before the ride starts, a rider is level and stationary, and the electronic sensor reads 760 N. At the top of the loop, the rider is upside-down and moving, and the sensor reads 390 N. What is the speed of the rider at the top of the loop?
The membrane surrounding a living cell consists of an inner and an outer wall that are separated by a small space. find the magnitude of the electric field within the cell membrane
the speed of a bobsled is increasing because it has an acceleration of . at a given instant in time the forces
A 75 kg skater, starts at 6m above the ground, potential energy =0 at 2m above the ground. Calcualte the percentage difference between the two speeds
A slab of ice floats on a freshwater lake. What minimum volume must the slab have for a 45.0kg woman to be able to stand on it withoutgetting her feet wet
a bucket of water with a mass of 7.0 kg is attached to a rope that is wound around a cylinder. the cylinder has a mass
Sam heaves a shot with weight 16-lb straight upward, giving it a constant upward acceleration from rest of 45.9 m/s^2 for a height 61.0 cm. How much time does he have to get out of its way before it returns to the height of the top of his head, a ..
A small package is fired off Earth's surface with an unknown launchspeed at a 40.0^\circ angle with the localhorizontal. What is the speed of the package when it reaches its maximum height
A particle with charge of 7.70 microC and v= 435 m/s is acted on by both an electric and magnetic field. what is the strength of the magnetic field
A 34.4-kg crate rests on a horizontal floor, and a 71.8-kg person is standing on the crate. Determine the magnitude of the normal force that the floor exerts on the crate
the speed of a transverse wave on a string is 479 ms while the wavelength is 0.257 m. the amplitude of the wave is 2.06
As a bar magnet moves toward a 150-turn coil, the magnetic field (which is perpendicular to the plane of the coil) changes from 0.25 T to 0.53 T in 0.3 s. find the magnitude of the induced current in the coil
a uniform electric field of magnitude 390 nc pointing in the positive x-direction acts on an electron which is
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